Integrand size = 37, antiderivative size = 365 \[ \int \frac {\sqrt {2-3 x} \sqrt {1+4 x}}{\sqrt {-5+2 x} \sqrt {7+5 x}} \, dx=\frac {\sqrt {2-3 x} \sqrt {1+4 x} \sqrt {7+5 x}}{5 \sqrt {-5+2 x}}-\frac {\sqrt {429} \sqrt {2-3 x} \sqrt {\frac {7+5 x}{5-2 x}} E\left (\arcsin \left (\frac {\sqrt {\frac {39}{23}} \sqrt {1+4 x}}{\sqrt {-5+2 x}}\right )|-\frac {23}{39}\right )}{10 \sqrt {\frac {2-3 x}{5-2 x}} \sqrt {7+5 x}}+\frac {7 \sqrt {\frac {11}{23}} \sqrt {7+5 x} \operatorname {EllipticF}\left (\arctan \left (\frac {\sqrt {1+4 x}}{\sqrt {2} \sqrt {2-3 x}}\right ),-\frac {39}{23}\right )}{10 \sqrt {-5+2 x} \sqrt {\frac {7+5 x}{5-2 x}}}+\frac {41 \sqrt {\frac {11}{62}} \sqrt {2-3 x} \operatorname {EllipticF}\left (\arctan \left (\frac {\sqrt {\frac {22}{23}} \sqrt {7+5 x}}{\sqrt {-5+2 x}}\right ),\frac {39}{62}\right )}{20 \sqrt {-\frac {2-3 x}{1+4 x}} \sqrt {1+4 x}}+\frac {943 \sqrt {2-3 x} \operatorname {EllipticPi}\left (\frac {78}{55},\arctan \left (\frac {\sqrt {\frac {22}{23}} \sqrt {7+5 x}}{\sqrt {-5+2 x}}\right ),\frac {39}{62}\right )}{100 \sqrt {682} \sqrt {-\frac {2-3 x}{1+4 x}} \sqrt {1+4 x}} \]
41/1240*(1/(529+506*(7+5*x)/(-5+2*x)))^(1/2)*(529+506*(7+5*x)/(-5+2*x))^(1 /2)*EllipticF(506^(1/2)*(7+5*x)^(1/2)/(-5+2*x)^(1/2)/(529+506*(7+5*x)/(-5+ 2*x))^(1/2),1/62*2418^(1/2))*682^(1/2)*(2-3*x)^(1/2)/((-2+3*x)/(1+4*x))^(1 /2)/(1+4*x)^(1/2)+943/68200*(1/(529+506*(7+5*x)/(-5+2*x)))^(1/2)*(529+506* (7+5*x)/(-5+2*x))^(1/2)*EllipticPi(506^(1/2)*(7+5*x)^(1/2)/(-5+2*x)^(1/2)/ (529+506*(7+5*x)/(-5+2*x))^(1/2),78/55,1/62*2418^(1/2))*(2-3*x)^(1/2)*682^ (1/2)/((-2+3*x)/(1+4*x))^(1/2)/(1+4*x)^(1/2)+1/5*(2-3*x)^(1/2)*(1+4*x)^(1/ 2)*(7+5*x)^(1/2)/(-5+2*x)^(1/2)+7/230*(1/(4+2*(1+4*x)/(2-3*x)))^(1/2)*(4+2 *(1+4*x)/(2-3*x))^(1/2)*EllipticF((1+4*x)^(1/2)*2^(1/2)/(2-3*x)^(1/2)/(4+2 *(1+4*x)/(2-3*x))^(1/2),1/23*I*897^(1/2))*253^(1/2)*(7+5*x)^(1/2)/(-5+2*x) ^(1/2)/((7+5*x)/(5-2*x))^(1/2)-1/10*EllipticE(1/23*897^(1/2)*(1+4*x)^(1/2) /(-5+2*x)^(1/2),1/39*I*897^(1/2))*429^(1/2)*(2-3*x)^(1/2)*((7+5*x)/(5-2*x) )^(1/2)/((2-3*x)/(5-2*x))^(1/2)/(7+5*x)^(1/2)
Time = 5.51 (sec) , antiderivative size = 318, normalized size of antiderivative = 0.87 \[ \int \frac {\sqrt {2-3 x} \sqrt {1+4 x}}{\sqrt {-5+2 x} \sqrt {7+5 x}} \, dx=\frac {\sqrt {2-3 x} \left (-3410 \sqrt {682} \sqrt {\frac {5-2 x}{7+5 x}} \sqrt {\frac {1+4 x}{7+5 x}} \left (-14+11 x+15 x^2\right ) E\left (\arcsin \left (\sqrt {\frac {155-62 x}{77+55 x}}\right )|\frac {23}{62}\right )+1984 \sqrt {682} \sqrt {\frac {5-2 x}{7+5 x}} \sqrt {\frac {1+4 x}{7+5 x}} \left (-14+11 x+15 x^2\right ) \operatorname {EllipticF}\left (\arcsin \left (\sqrt {\frac {155-62 x}{77+55 x}}\right ),\frac {23}{62}\right )+\sqrt {\frac {-2+3 x}{7+5 x}} \left (17050 \left (10+21 x-70 x^2+24 x^3\right )-1599 \sqrt {682} \sqrt {\frac {1+4 x}{7+5 x}} (7+5 x)^2 \sqrt {\frac {-10+19 x-6 x^2}{(7+5 x)^2}} \operatorname {EllipticPi}\left (-\frac {55}{62},\arcsin \left (\sqrt {\frac {155-62 x}{77+55 x}}\right ),\frac {23}{62}\right )\right )\right )}{34100 \sqrt {-5+2 x} \sqrt {1+4 x} \left (\frac {-2+3 x}{7+5 x}\right )^{3/2} (7+5 x)^{3/2}} \]
(Sqrt[2 - 3*x]*(-3410*Sqrt[682]*Sqrt[(5 - 2*x)/(7 + 5*x)]*Sqrt[(1 + 4*x)/( 7 + 5*x)]*(-14 + 11*x + 15*x^2)*EllipticE[ArcSin[Sqrt[(155 - 62*x)/(77 + 5 5*x)]], 23/62] + 1984*Sqrt[682]*Sqrt[(5 - 2*x)/(7 + 5*x)]*Sqrt[(1 + 4*x)/( 7 + 5*x)]*(-14 + 11*x + 15*x^2)*EllipticF[ArcSin[Sqrt[(155 - 62*x)/(77 + 5 5*x)]], 23/62] + Sqrt[(-2 + 3*x)/(7 + 5*x)]*(17050*(10 + 21*x - 70*x^2 + 2 4*x^3) - 1599*Sqrt[682]*Sqrt[(1 + 4*x)/(7 + 5*x)]*(7 + 5*x)^2*Sqrt[(-10 + 19*x - 6*x^2)/(7 + 5*x)^2]*EllipticPi[-55/62, ArcSin[Sqrt[(155 - 62*x)/(77 + 55*x)]], 23/62])))/(34100*Sqrt[-5 + 2*x]*Sqrt[1 + 4*x]*((-2 + 3*x)/(7 + 5*x))^(3/2)*(7 + 5*x)^(3/2))
Time = 0.56 (sec) , antiderivative size = 608, normalized size of antiderivative = 1.67, number of steps used = 13, number of rules used = 12, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.324, Rules used = {191, 183, 27, 188, 27, 194, 27, 320, 327, 411, 320, 414}
Below are the steps used by Rubi to obtain the solution. The rule number used for the transformation is given above next to the arrow. The rules definitions used are listed below.
\(\displaystyle \int \frac {\sqrt {2-3 x} \sqrt {4 x+1}}{\sqrt {2 x-5} \sqrt {5 x+7}} \, dx\) |
\(\Big \downarrow \) 191 |
\(\displaystyle \frac {429}{10} \int \frac {\sqrt {2-3 x}}{(2 x-5)^{3/2} \sqrt {4 x+1} \sqrt {5 x+7}}dx+\frac {77}{20} \int \frac {1}{\sqrt {2-3 x} \sqrt {2 x-5} \sqrt {4 x+1} \sqrt {5 x+7}}dx-\frac {41}{20} \int \frac {\sqrt {2 x-5}}{\sqrt {2-3 x} \sqrt {4 x+1} \sqrt {5 x+7}}dx+\frac {\sqrt {2-3 x} \sqrt {4 x+1} \sqrt {5 x+7}}{5 \sqrt {2 x-5}}\) |
\(\Big \downarrow \) 183 |
\(\displaystyle \frac {429}{10} \int \frac {\sqrt {2-3 x}}{(2 x-5)^{3/2} \sqrt {4 x+1} \sqrt {5 x+7}}dx+\frac {77}{20} \int \frac {1}{\sqrt {2-3 x} \sqrt {2 x-5} \sqrt {4 x+1} \sqrt {5 x+7}}dx+\frac {1599 \sqrt {\frac {2-3 x}{5-2 x}} (5-2 x) \sqrt {-\frac {4 x+1}{5-2 x}} \int \frac {\sqrt {713}}{\left (5-\frac {2 (5 x+7)}{2 x-5}\right ) \sqrt {\frac {11 (5 x+7)}{2 x-5}+31} \sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}d\frac {\sqrt {5 x+7}}{\sqrt {2 x-5}}}{10 \sqrt {713} \sqrt {2-3 x} \sqrt {4 x+1}}+\frac {\sqrt {2-3 x} \sqrt {4 x+1} \sqrt {5 x+7}}{5 \sqrt {2 x-5}}\) |
\(\Big \downarrow \) 27 |
\(\displaystyle \frac {429}{10} \int \frac {\sqrt {2-3 x}}{(2 x-5)^{3/2} \sqrt {4 x+1} \sqrt {5 x+7}}dx+\frac {77}{20} \int \frac {1}{\sqrt {2-3 x} \sqrt {2 x-5} \sqrt {4 x+1} \sqrt {5 x+7}}dx+\frac {1599 \sqrt {\frac {2-3 x}{5-2 x}} (5-2 x) \sqrt {-\frac {4 x+1}{5-2 x}} \int \frac {1}{\left (5-\frac {2 (5 x+7)}{2 x-5}\right ) \sqrt {\frac {11 (5 x+7)}{2 x-5}+31} \sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}d\frac {\sqrt {5 x+7}}{\sqrt {2 x-5}}}{10 \sqrt {2-3 x} \sqrt {4 x+1}}+\frac {\sqrt {2-3 x} \sqrt {4 x+1} \sqrt {5 x+7}}{5 \sqrt {2 x-5}}\) |
\(\Big \downarrow \) 188 |
\(\displaystyle \frac {429}{10} \int \frac {\sqrt {2-3 x}}{(2 x-5)^{3/2} \sqrt {4 x+1} \sqrt {5 x+7}}dx+\frac {7 \sqrt {\frac {11}{46}} \sqrt {\frac {5-2 x}{2-3 x}} \sqrt {5 x+7} \int \frac {\sqrt {46}}{\sqrt {\frac {4 x+1}{2-3 x}+2} \sqrt {\frac {31 (4 x+1)}{2-3 x}+23}}d\frac {\sqrt {4 x+1}}{\sqrt {2-3 x}}}{10 \sqrt {2 x-5} \sqrt {\frac {5 x+7}{2-3 x}}}+\frac {1599 \sqrt {\frac {2-3 x}{5-2 x}} (5-2 x) \sqrt {-\frac {4 x+1}{5-2 x}} \int \frac {1}{\left (5-\frac {2 (5 x+7)}{2 x-5}\right ) \sqrt {\frac {11 (5 x+7)}{2 x-5}+31} \sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}d\frac {\sqrt {5 x+7}}{\sqrt {2 x-5}}}{10 \sqrt {2-3 x} \sqrt {4 x+1}}+\frac {\sqrt {2-3 x} \sqrt {4 x+1} \sqrt {5 x+7}}{5 \sqrt {2 x-5}}\) |
\(\Big \downarrow \) 27 |
\(\displaystyle \frac {429}{10} \int \frac {\sqrt {2-3 x}}{(2 x-5)^{3/2} \sqrt {4 x+1} \sqrt {5 x+7}}dx+\frac {7 \sqrt {11} \sqrt {\frac {5-2 x}{2-3 x}} \sqrt {5 x+7} \int \frac {1}{\sqrt {\frac {4 x+1}{2-3 x}+2} \sqrt {\frac {31 (4 x+1)}{2-3 x}+23}}d\frac {\sqrt {4 x+1}}{\sqrt {2-3 x}}}{10 \sqrt {2 x-5} \sqrt {\frac {5 x+7}{2-3 x}}}+\frac {1599 \sqrt {\frac {2-3 x}{5-2 x}} (5-2 x) \sqrt {-\frac {4 x+1}{5-2 x}} \int \frac {1}{\left (5-\frac {2 (5 x+7)}{2 x-5}\right ) \sqrt {\frac {11 (5 x+7)}{2 x-5}+31} \sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}d\frac {\sqrt {5 x+7}}{\sqrt {2 x-5}}}{10 \sqrt {2-3 x} \sqrt {4 x+1}}+\frac {\sqrt {2-3 x} \sqrt {4 x+1} \sqrt {5 x+7}}{5 \sqrt {2 x-5}}\) |
\(\Big \downarrow \) 194 |
\(\displaystyle \frac {7 \sqrt {11} \sqrt {\frac {5-2 x}{2-3 x}} \sqrt {5 x+7} \int \frac {1}{\sqrt {\frac {4 x+1}{2-3 x}+2} \sqrt {\frac {31 (4 x+1)}{2-3 x}+23}}d\frac {\sqrt {4 x+1}}{\sqrt {2-3 x}}}{10 \sqrt {2 x-5} \sqrt {\frac {5 x+7}{2-3 x}}}-\frac {39 \sqrt {\frac {11}{23}} \sqrt {2-3 x} \sqrt {\frac {5 x+7}{5-2 x}} \int \frac {\sqrt {23} \sqrt {\frac {4 x+1}{2 x-5}+1}}{\sqrt {23-\frac {39 (4 x+1)}{2 x-5}}}d\frac {\sqrt {4 x+1}}{\sqrt {2 x-5}}}{10 \sqrt {\frac {2-3 x}{5-2 x}} \sqrt {5 x+7}}+\frac {1599 \sqrt {\frac {2-3 x}{5-2 x}} (5-2 x) \sqrt {-\frac {4 x+1}{5-2 x}} \int \frac {1}{\left (5-\frac {2 (5 x+7)}{2 x-5}\right ) \sqrt {\frac {11 (5 x+7)}{2 x-5}+31} \sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}d\frac {\sqrt {5 x+7}}{\sqrt {2 x-5}}}{10 \sqrt {2-3 x} \sqrt {4 x+1}}+\frac {\sqrt {2-3 x} \sqrt {4 x+1} \sqrt {5 x+7}}{5 \sqrt {2 x-5}}\) |
\(\Big \downarrow \) 27 |
\(\displaystyle \frac {7 \sqrt {11} \sqrt {\frac {5-2 x}{2-3 x}} \sqrt {5 x+7} \int \frac {1}{\sqrt {\frac {4 x+1}{2-3 x}+2} \sqrt {\frac {31 (4 x+1)}{2-3 x}+23}}d\frac {\sqrt {4 x+1}}{\sqrt {2-3 x}}}{10 \sqrt {2 x-5} \sqrt {\frac {5 x+7}{2-3 x}}}-\frac {39 \sqrt {11} \sqrt {2-3 x} \sqrt {\frac {5 x+7}{5-2 x}} \int \frac {\sqrt {\frac {4 x+1}{2 x-5}+1}}{\sqrt {23-\frac {39 (4 x+1)}{2 x-5}}}d\frac {\sqrt {4 x+1}}{\sqrt {2 x-5}}}{10 \sqrt {\frac {2-3 x}{5-2 x}} \sqrt {5 x+7}}+\frac {1599 \sqrt {\frac {2-3 x}{5-2 x}} (5-2 x) \sqrt {-\frac {4 x+1}{5-2 x}} \int \frac {1}{\left (5-\frac {2 (5 x+7)}{2 x-5}\right ) \sqrt {\frac {11 (5 x+7)}{2 x-5}+31} \sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}d\frac {\sqrt {5 x+7}}{\sqrt {2 x-5}}}{10 \sqrt {2-3 x} \sqrt {4 x+1}}+\frac {\sqrt {2-3 x} \sqrt {4 x+1} \sqrt {5 x+7}}{5 \sqrt {2 x-5}}\) |
\(\Big \downarrow \) 320 |
\(\displaystyle -\frac {39 \sqrt {11} \sqrt {2-3 x} \sqrt {\frac {5 x+7}{5-2 x}} \int \frac {\sqrt {\frac {4 x+1}{2 x-5}+1}}{\sqrt {23-\frac {39 (4 x+1)}{2 x-5}}}d\frac {\sqrt {4 x+1}}{\sqrt {2 x-5}}}{10 \sqrt {\frac {2-3 x}{5-2 x}} \sqrt {5 x+7}}+\frac {1599 \sqrt {\frac {2-3 x}{5-2 x}} (5-2 x) \sqrt {-\frac {4 x+1}{5-2 x}} \int \frac {1}{\left (5-\frac {2 (5 x+7)}{2 x-5}\right ) \sqrt {\frac {11 (5 x+7)}{2 x-5}+31} \sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}d\frac {\sqrt {5 x+7}}{\sqrt {2 x-5}}}{10 \sqrt {2-3 x} \sqrt {4 x+1}}+\frac {7 \sqrt {\frac {11}{23}} \sqrt {\frac {5-2 x}{2-3 x}} \sqrt {5 x+7} \sqrt {\frac {31 (4 x+1)}{2-3 x}+23} \operatorname {EllipticF}\left (\arctan \left (\frac {\sqrt {4 x+1}}{\sqrt {2} \sqrt {2-3 x}}\right ),-\frac {39}{23}\right )}{10 \sqrt {2 x-5} \sqrt {\frac {5 x+7}{2-3 x}} \sqrt {\frac {4 x+1}{2-3 x}+2} \sqrt {\frac {\frac {31 (4 x+1)}{2-3 x}+23}{\frac {4 x+1}{2-3 x}+2}}}+\frac {\sqrt {2-3 x} \sqrt {4 x+1} \sqrt {5 x+7}}{5 \sqrt {2 x-5}}\) |
\(\Big \downarrow \) 327 |
\(\displaystyle \frac {1599 \sqrt {\frac {2-3 x}{5-2 x}} (5-2 x) \sqrt {-\frac {4 x+1}{5-2 x}} \int \frac {1}{\left (5-\frac {2 (5 x+7)}{2 x-5}\right ) \sqrt {\frac {11 (5 x+7)}{2 x-5}+31} \sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}d\frac {\sqrt {5 x+7}}{\sqrt {2 x-5}}}{10 \sqrt {2-3 x} \sqrt {4 x+1}}-\frac {\sqrt {429} \sqrt {2-3 x} \sqrt {\frac {5 x+7}{5-2 x}} E\left (\arcsin \left (\frac {\sqrt {\frac {39}{23}} \sqrt {4 x+1}}{\sqrt {2 x-5}}\right )|-\frac {23}{39}\right )}{10 \sqrt {\frac {2-3 x}{5-2 x}} \sqrt {5 x+7}}+\frac {7 \sqrt {\frac {11}{23}} \sqrt {\frac {5-2 x}{2-3 x}} \sqrt {5 x+7} \sqrt {\frac {31 (4 x+1)}{2-3 x}+23} \operatorname {EllipticF}\left (\arctan \left (\frac {\sqrt {4 x+1}}{\sqrt {2} \sqrt {2-3 x}}\right ),-\frac {39}{23}\right )}{10 \sqrt {2 x-5} \sqrt {\frac {5 x+7}{2-3 x}} \sqrt {\frac {4 x+1}{2-3 x}+2} \sqrt {\frac {\frac {31 (4 x+1)}{2-3 x}+23}{\frac {4 x+1}{2-3 x}+2}}}+\frac {\sqrt {2-3 x} \sqrt {4 x+1} \sqrt {5 x+7}}{5 \sqrt {2 x-5}}\) |
\(\Big \downarrow \) 411 |
\(\displaystyle \frac {1599 \sqrt {\frac {2-3 x}{5-2 x}} (5-2 x) \sqrt {-\frac {4 x+1}{5-2 x}} \left (\frac {11}{78} \int \frac {1}{\sqrt {\frac {11 (5 x+7)}{2 x-5}+31} \sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}d\frac {\sqrt {5 x+7}}{\sqrt {2 x-5}}+\frac {1}{78} \int \frac {\sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}{\left (5-\frac {2 (5 x+7)}{2 x-5}\right ) \sqrt {\frac {11 (5 x+7)}{2 x-5}+31}}d\frac {\sqrt {5 x+7}}{\sqrt {2 x-5}}\right )}{10 \sqrt {2-3 x} \sqrt {4 x+1}}-\frac {\sqrt {429} \sqrt {2-3 x} \sqrt {\frac {5 x+7}{5-2 x}} E\left (\arcsin \left (\frac {\sqrt {\frac {39}{23}} \sqrt {4 x+1}}{\sqrt {2 x-5}}\right )|-\frac {23}{39}\right )}{10 \sqrt {\frac {2-3 x}{5-2 x}} \sqrt {5 x+7}}+\frac {7 \sqrt {\frac {11}{23}} \sqrt {\frac {5-2 x}{2-3 x}} \sqrt {5 x+7} \sqrt {\frac {31 (4 x+1)}{2-3 x}+23} \operatorname {EllipticF}\left (\arctan \left (\frac {\sqrt {4 x+1}}{\sqrt {2} \sqrt {2-3 x}}\right ),-\frac {39}{23}\right )}{10 \sqrt {2 x-5} \sqrt {\frac {5 x+7}{2-3 x}} \sqrt {\frac {4 x+1}{2-3 x}+2} \sqrt {\frac {\frac {31 (4 x+1)}{2-3 x}+23}{\frac {4 x+1}{2-3 x}+2}}}+\frac {\sqrt {2-3 x} \sqrt {4 x+1} \sqrt {5 x+7}}{5 \sqrt {2 x-5}}\) |
\(\Big \downarrow \) 320 |
\(\displaystyle \frac {1599 \sqrt {\frac {2-3 x}{5-2 x}} (5-2 x) \sqrt {-\frac {4 x+1}{5-2 x}} \left (\frac {1}{78} \int \frac {\sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}{\left (5-\frac {2 (5 x+7)}{2 x-5}\right ) \sqrt {\frac {11 (5 x+7)}{2 x-5}+31}}d\frac {\sqrt {5 x+7}}{\sqrt {2 x-5}}+\frac {\sqrt {\frac {11}{62}} \sqrt {\frac {11 (5 x+7)}{2 x-5}+31} \operatorname {EllipticF}\left (\arctan \left (\frac {\sqrt {\frac {22}{23}} \sqrt {5 x+7}}{\sqrt {2 x-5}}\right ),\frac {39}{62}\right )}{78 \sqrt {\frac {\frac {11 (5 x+7)}{2 x-5}+31}{\frac {22 (5 x+7)}{2 x-5}+23}} \sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}\right )}{10 \sqrt {2-3 x} \sqrt {4 x+1}}-\frac {\sqrt {429} \sqrt {2-3 x} \sqrt {\frac {5 x+7}{5-2 x}} E\left (\arcsin \left (\frac {\sqrt {\frac {39}{23}} \sqrt {4 x+1}}{\sqrt {2 x-5}}\right )|-\frac {23}{39}\right )}{10 \sqrt {\frac {2-3 x}{5-2 x}} \sqrt {5 x+7}}+\frac {7 \sqrt {\frac {11}{23}} \sqrt {\frac {5-2 x}{2-3 x}} \sqrt {5 x+7} \sqrt {\frac {31 (4 x+1)}{2-3 x}+23} \operatorname {EllipticF}\left (\arctan \left (\frac {\sqrt {4 x+1}}{\sqrt {2} \sqrt {2-3 x}}\right ),-\frac {39}{23}\right )}{10 \sqrt {2 x-5} \sqrt {\frac {5 x+7}{2-3 x}} \sqrt {\frac {4 x+1}{2-3 x}+2} \sqrt {\frac {\frac {31 (4 x+1)}{2-3 x}+23}{\frac {4 x+1}{2-3 x}+2}}}+\frac {\sqrt {2-3 x} \sqrt {4 x+1} \sqrt {5 x+7}}{5 \sqrt {2 x-5}}\) |
\(\Big \downarrow \) 414 |
\(\displaystyle -\frac {\sqrt {429} \sqrt {2-3 x} \sqrt {\frac {5 x+7}{5-2 x}} E\left (\arcsin \left (\frac {\sqrt {\frac {39}{23}} \sqrt {4 x+1}}{\sqrt {2 x-5}}\right )|-\frac {23}{39}\right )}{10 \sqrt {\frac {2-3 x}{5-2 x}} \sqrt {5 x+7}}+\frac {7 \sqrt {\frac {11}{23}} \sqrt {\frac {5-2 x}{2-3 x}} \sqrt {5 x+7} \sqrt {\frac {31 (4 x+1)}{2-3 x}+23} \operatorname {EllipticF}\left (\arctan \left (\frac {\sqrt {4 x+1}}{\sqrt {2} \sqrt {2-3 x}}\right ),-\frac {39}{23}\right )}{10 \sqrt {2 x-5} \sqrt {\frac {5 x+7}{2-3 x}} \sqrt {\frac {4 x+1}{2-3 x}+2} \sqrt {\frac {\frac {31 (4 x+1)}{2-3 x}+23}{\frac {4 x+1}{2-3 x}+2}}}+\frac {1599 \sqrt {\frac {2-3 x}{5-2 x}} (5-2 x) \sqrt {-\frac {4 x+1}{5-2 x}} \left (\frac {\sqrt {\frac {11}{62}} \sqrt {\frac {11 (5 x+7)}{2 x-5}+31} \operatorname {EllipticF}\left (\arctan \left (\frac {\sqrt {\frac {22}{23}} \sqrt {5 x+7}}{\sqrt {2 x-5}}\right ),\frac {39}{62}\right )}{78 \sqrt {\frac {\frac {11 (5 x+7)}{2 x-5}+31}{\frac {22 (5 x+7)}{2 x-5}+23}} \sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}+\frac {23 \sqrt {\frac {11 (5 x+7)}{2 x-5}+31} \operatorname {EllipticPi}\left (\frac {78}{55},\arctan \left (\frac {\sqrt {\frac {22}{23}} \sqrt {5 x+7}}{\sqrt {2 x-5}}\right ),\frac {39}{62}\right )}{390 \sqrt {682} \sqrt {\frac {\frac {11 (5 x+7)}{2 x-5}+31}{\frac {22 (5 x+7)}{2 x-5}+23}} \sqrt {\frac {22 (5 x+7)}{2 x-5}+23}}\right )}{10 \sqrt {2-3 x} \sqrt {4 x+1}}+\frac {\sqrt {2-3 x} \sqrt {4 x+1} \sqrt {5 x+7}}{5 \sqrt {2 x-5}}\) |
(Sqrt[2 - 3*x]*Sqrt[1 + 4*x]*Sqrt[7 + 5*x])/(5*Sqrt[-5 + 2*x]) - (Sqrt[429 ]*Sqrt[2 - 3*x]*Sqrt[(7 + 5*x)/(5 - 2*x)]*EllipticE[ArcSin[(Sqrt[39/23]*Sq rt[1 + 4*x])/Sqrt[-5 + 2*x]], -23/39])/(10*Sqrt[(2 - 3*x)/(5 - 2*x)]*Sqrt[ 7 + 5*x]) + (7*Sqrt[11/23]*Sqrt[(5 - 2*x)/(2 - 3*x)]*Sqrt[7 + 5*x]*Sqrt[23 + (31*(1 + 4*x))/(2 - 3*x)]*EllipticF[ArcTan[Sqrt[1 + 4*x]/(Sqrt[2]*Sqrt[ 2 - 3*x])], -39/23])/(10*Sqrt[-5 + 2*x]*Sqrt[(7 + 5*x)/(2 - 3*x)]*Sqrt[2 + (1 + 4*x)/(2 - 3*x)]*Sqrt[(23 + (31*(1 + 4*x))/(2 - 3*x))/(2 + (1 + 4*x)/ (2 - 3*x))]) + (1599*Sqrt[(2 - 3*x)/(5 - 2*x)]*(5 - 2*x)*Sqrt[-((1 + 4*x)/ (5 - 2*x))]*((Sqrt[11/62]*Sqrt[31 + (11*(7 + 5*x))/(-5 + 2*x)]*EllipticF[A rcTan[(Sqrt[22/23]*Sqrt[7 + 5*x])/Sqrt[-5 + 2*x]], 39/62])/(78*Sqrt[(31 + (11*(7 + 5*x))/(-5 + 2*x))/(23 + (22*(7 + 5*x))/(-5 + 2*x))]*Sqrt[23 + (22 *(7 + 5*x))/(-5 + 2*x)]) + (23*Sqrt[31 + (11*(7 + 5*x))/(-5 + 2*x)]*Ellipt icPi[78/55, ArcTan[(Sqrt[22/23]*Sqrt[7 + 5*x])/Sqrt[-5 + 2*x]], 39/62])/(3 90*Sqrt[682]*Sqrt[(31 + (11*(7 + 5*x))/(-5 + 2*x))/(23 + (22*(7 + 5*x))/(- 5 + 2*x))]*Sqrt[23 + (22*(7 + 5*x))/(-5 + 2*x)])))/(10*Sqrt[2 - 3*x]*Sqrt[ 1 + 4*x])
3.1.88.3.1 Defintions of rubi rules used
Int[(a_)*(Fx_), x_Symbol] :> Simp[a Int[Fx, x], x] /; FreeQ[a, x] && !Ma tchQ[Fx, (b_)*(Gx_) /; FreeQ[b, x]]
Int[Sqrt[(a_.) + (b_.)*(x_)]/(Sqrt[(c_.) + (d_.)*(x_)]*Sqrt[(e_.) + (f_.)*( x_)]*Sqrt[(g_.) + (h_.)*(x_)]), x_] :> Simp[2*(a + b*x)*Sqrt[(b*g - a*h)*(( c + d*x)/((d*g - c*h)*(a + b*x)))]*(Sqrt[(b*g - a*h)*((e + f*x)/((f*g - e*h )*(a + b*x)))]/(Sqrt[c + d*x]*Sqrt[e + f*x])) Subst[Int[1/((h - b*x^2)*Sq rt[1 + (b*c - a*d)*(x^2/(d*g - c*h))]*Sqrt[1 + (b*e - a*f)*(x^2/(f*g - e*h) )]), x], x, Sqrt[g + h*x]/Sqrt[a + b*x]], x] /; FreeQ[{a, b, c, d, e, f, g, h}, x]
Int[1/(Sqrt[(a_.) + (b_.)*(x_)]*Sqrt[(c_.) + (d_.)*(x_)]*Sqrt[(e_.) + (f_.) *(x_)]*Sqrt[(g_.) + (h_.)*(x_)]), x_] :> Simp[2*Sqrt[g + h*x]*(Sqrt[(b*e - a*f)*((c + d*x)/((d*e - c*f)*(a + b*x)))]/((f*g - e*h)*Sqrt[c + d*x]*Sqrt[( -(b*e - a*f))*((g + h*x)/((f*g - e*h)*(a + b*x)))])) Subst[Int[1/(Sqrt[1 + (b*c - a*d)*(x^2/(d*e - c*f))]*Sqrt[1 - (b*g - a*h)*(x^2/(f*g - e*h))]), x], x, Sqrt[e + f*x]/Sqrt[a + b*x]], x] /; FreeQ[{a, b, c, d, e, f, g, h}, x]
Int[(Sqrt[(a_.) + (b_.)*(x_)]*Sqrt[(c_.) + (d_.)*(x_)])/(Sqrt[(e_.) + (f_.) *(x_)]*Sqrt[(g_.) + (h_.)*(x_)]), x_] :> Simp[Sqrt[a + b*x]*Sqrt[c + d*x]*( Sqrt[g + h*x]/(h*Sqrt[e + f*x])), x] + (-Simp[(d*e - c*f)*((f*g - e*h)/(2*f *h)) Int[Sqrt[a + b*x]/(Sqrt[c + d*x]*(e + f*x)^(3/2)*Sqrt[g + h*x]), x], x] + Simp[(a*d*f*h - b*(d*f*g + d*e*h - c*f*h))/(2*f^2*h) Int[Sqrt[e + f *x]/(Sqrt[a + b*x]*Sqrt[c + d*x]*Sqrt[g + h*x]), x], x] + Simp[(d*e - c*f)* ((b*f*g + b*e*h - 2*a*f*h)/(2*f^2*h)) Int[1/(Sqrt[a + b*x]*Sqrt[c + d*x]* Sqrt[e + f*x]*Sqrt[g + h*x]), x], x]) /; FreeQ[{a, b, c, d, e, f, g, h}, x]
Int[Sqrt[(c_.) + (d_.)*(x_)]/(((a_.) + (b_.)*(x_))^(3/2)*Sqrt[(e_.) + (f_.) *(x_)]*Sqrt[(g_.) + (h_.)*(x_)]), x_] :> Simp[-2*Sqrt[c + d*x]*(Sqrt[(-(b*e - a*f))*((g + h*x)/((f*g - e*h)*(a + b*x)))]/((b*e - a*f)*Sqrt[g + h*x]*Sq rt[(b*e - a*f)*((c + d*x)/((d*e - c*f)*(a + b*x)))])) Subst[Int[Sqrt[1 + (b*c - a*d)*(x^2/(d*e - c*f))]/Sqrt[1 - (b*g - a*h)*(x^2/(f*g - e*h))], x], x, Sqrt[e + f*x]/Sqrt[a + b*x]], x] /; FreeQ[{a, b, c, d, e, f, g, h}, x]
Int[1/(Sqrt[(a_) + (b_.)*(x_)^2]*Sqrt[(c_) + (d_.)*(x_)^2]), x_Symbol] :> S imp[(Sqrt[a + b*x^2]/(a*Rt[d/c, 2]*Sqrt[c + d*x^2]*Sqrt[c*((a + b*x^2)/(a*( c + d*x^2)))]))*EllipticF[ArcTan[Rt[d/c, 2]*x], 1 - b*(c/(a*d))], x] /; Fre eQ[{a, b, c, d}, x] && PosQ[d/c] && PosQ[b/a] && !SimplerSqrtQ[b/a, d/c]
Int[Sqrt[(a_) + (b_.)*(x_)^2]/Sqrt[(c_) + (d_.)*(x_)^2], x_Symbol] :> Simp[ (Sqrt[a]/(Sqrt[c]*Rt[-d/c, 2]))*EllipticE[ArcSin[Rt[-d/c, 2]*x], b*(c/(a*d) )], x] /; FreeQ[{a, b, c, d}, x] && NegQ[d/c] && GtQ[c, 0] && GtQ[a, 0]
Int[1/(((a_) + (b_.)*(x_)^2)*Sqrt[(c_) + (d_.)*(x_)^2]*Sqrt[(e_) + (f_.)*(x _)^2]), x_Symbol] :> Simp[-f/(b*e - a*f) Int[1/(Sqrt[c + d*x^2]*Sqrt[e + f*x^2]), x], x] + Simp[b/(b*e - a*f) Int[Sqrt[e + f*x^2]/((a + b*x^2)*Sqr t[c + d*x^2]), x], x] /; FreeQ[{a, b, c, d, e, f}, x] && GtQ[d/c, 0] && GtQ [f/e, 0] && !SimplerSqrtQ[d/c, f/e]
Int[Sqrt[(c_) + (d_.)*(x_)^2]/(((a_) + (b_.)*(x_)^2)*Sqrt[(e_) + (f_.)*(x_) ^2]), x_Symbol] :> Simp[c*(Sqrt[e + f*x^2]/(a*e*Rt[d/c, 2]*Sqrt[c + d*x^2]* Sqrt[c*((e + f*x^2)/(e*(c + d*x^2)))]))*EllipticPi[1 - b*(c/(a*d)), ArcTan[ Rt[d/c, 2]*x], 1 - c*(f/(d*e))], x] /; FreeQ[{a, b, c, d, e, f}, x] && PosQ [d/c]
Time = 1.61 (sec) , antiderivative size = 397, normalized size of antiderivative = 1.09
method | result | size |
elliptic | \(\frac {\sqrt {-\left (7+5 x \right ) \left (-2+3 x \right ) \left (-5+2 x \right ) \left (1+4 x \right )}\, \left (\frac {4 \sqrt {-\frac {3795 \left (x +\frac {7}{5}\right )}{-\frac {2}{3}+x}}\, \left (-\frac {2}{3}+x \right )^{2} \sqrt {806}\, \sqrt {\frac {x -\frac {5}{2}}{-\frac {2}{3}+x}}\, \sqrt {2139}\, \sqrt {\frac {x +\frac {1}{4}}{-\frac {2}{3}+x}}\, F\left (\frac {\sqrt {-\frac {3795 \left (x +\frac {7}{5}\right )}{-\frac {2}{3}+x}}}{69}, \frac {i \sqrt {897}}{39}\right )}{305877 \sqrt {-30 \left (x +\frac {7}{5}\right ) \left (-\frac {2}{3}+x \right ) \left (x -\frac {5}{2}\right ) \left (x +\frac {1}{4}\right )}}+\frac {10 \sqrt {-\frac {3795 \left (x +\frac {7}{5}\right )}{-\frac {2}{3}+x}}\, \left (-\frac {2}{3}+x \right )^{2} \sqrt {806}\, \sqrt {\frac {x -\frac {5}{2}}{-\frac {2}{3}+x}}\, \sqrt {2139}\, \sqrt {\frac {x +\frac {1}{4}}{-\frac {2}{3}+x}}\, \left (\frac {2 F\left (\frac {\sqrt {-\frac {3795 \left (x +\frac {7}{5}\right )}{-\frac {2}{3}+x}}}{69}, \frac {i \sqrt {897}}{39}\right )}{3}-\frac {31 \Pi \left (\frac {\sqrt {-\frac {3795 \left (x +\frac {7}{5}\right )}{-\frac {2}{3}+x}}}{69}, -\frac {69}{55}, \frac {i \sqrt {897}}{39}\right )}{15}\right )}{305877 \sqrt {-30 \left (x +\frac {7}{5}\right ) \left (-\frac {2}{3}+x \right ) \left (x -\frac {5}{2}\right ) \left (x +\frac {1}{4}\right )}}-\frac {6 \left (\left (x +\frac {7}{5}\right ) \left (x -\frac {5}{2}\right ) \left (x +\frac {1}{4}\right )-\frac {\sqrt {-\frac {3795 \left (x +\frac {7}{5}\right )}{-\frac {2}{3}+x}}\, \left (-\frac {2}{3}+x \right )^{2} \sqrt {806}\, \sqrt {\frac {x -\frac {5}{2}}{-\frac {2}{3}+x}}\, \sqrt {2139}\, \sqrt {\frac {x +\frac {1}{4}}{-\frac {2}{3}+x}}\, \left (\frac {181 F\left (\frac {\sqrt {-\frac {3795 \left (x +\frac {7}{5}\right )}{-\frac {2}{3}+x}}}{69}, \frac {i \sqrt {897}}{39}\right )}{341}-\frac {117 E\left (\frac {\sqrt {-\frac {3795 \left (x +\frac {7}{5}\right )}{-\frac {2}{3}+x}}}{69}, \frac {i \sqrt {897}}{39}\right )}{62}+\frac {91 \Pi \left (\frac {\sqrt {-\frac {3795 \left (x +\frac {7}{5}\right )}{-\frac {2}{3}+x}}}{69}, -\frac {69}{55}, \frac {i \sqrt {897}}{39}\right )}{55}\right )}{80730}\right )}{\sqrt {-30 \left (x +\frac {7}{5}\right ) \left (-\frac {2}{3}+x \right ) \left (x -\frac {5}{2}\right ) \left (x +\frac {1}{4}\right )}}\right )}{\sqrt {2-3 x}\, \sqrt {-5+2 x}\, \sqrt {1+4 x}\, \sqrt {7+5 x}}\) | \(397\) |
default | \(-\frac {\sqrt {2-3 x}\, \sqrt {1+4 x}\, \sqrt {7+5 x}\, \sqrt {-5+2 x}\, \left (30690 \sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}\, \sqrt {13}\, \sqrt {3}\, \sqrt {\frac {-5+2 x}{-2+3 x}}\, \sqrt {23}\, \sqrt {\frac {1+4 x}{-2+3 x}}\, x^{2} F\left (\frac {\sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}}{23}, \frac {i \sqrt {897}}{39}\right )+22878 \sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}\, \sqrt {13}\, \sqrt {3}\, \sqrt {\frac {-5+2 x}{-2+3 x}}\, \sqrt {23}\, \sqrt {\frac {1+4 x}{-2+3 x}}\, x^{2} \Pi \left (\frac {\sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}}{23}, -\frac {69}{55}, \frac {i \sqrt {897}}{39}\right )-57915 \sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}\, \sqrt {13}\, \sqrt {3}\, \sqrt {\frac {-5+2 x}{-2+3 x}}\, \sqrt {23}\, \sqrt {\frac {1+4 x}{-2+3 x}}\, x^{2} E\left (\frac {\sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}}{23}, \frac {i \sqrt {897}}{39}\right )-40920 \sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}\, \sqrt {13}\, \sqrt {3}\, \sqrt {\frac {-5+2 x}{-2+3 x}}\, \sqrt {23}\, \sqrt {\frac {1+4 x}{-2+3 x}}\, x F\left (\frac {\sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}}{23}, \frac {i \sqrt {897}}{39}\right )-30504 \sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}\, \sqrt {13}\, \sqrt {3}\, \sqrt {\frac {-5+2 x}{-2+3 x}}\, \sqrt {23}\, \sqrt {\frac {1+4 x}{-2+3 x}}\, x \Pi \left (\frac {\sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}}{23}, -\frac {69}{55}, \frac {i \sqrt {897}}{39}\right )+77220 \sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}\, \sqrt {13}\, \sqrt {3}\, \sqrt {\frac {-5+2 x}{-2+3 x}}\, \sqrt {23}\, \sqrt {\frac {1+4 x}{-2+3 x}}\, x E\left (\frac {\sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}}{23}, \frac {i \sqrt {897}}{39}\right )+13640 \sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}\, \sqrt {13}\, \sqrt {3}\, \sqrt {\frac {-5+2 x}{-2+3 x}}\, \sqrt {23}\, \sqrt {\frac {1+4 x}{-2+3 x}}\, F\left (\frac {\sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}}{23}, \frac {i \sqrt {897}}{39}\right )+10168 \sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}\, \sqrt {13}\, \sqrt {3}\, \sqrt {\frac {-5+2 x}{-2+3 x}}\, \sqrt {23}\, \sqrt {\frac {1+4 x}{-2+3 x}}\, \Pi \left (\frac {\sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}}{23}, -\frac {69}{55}, \frac {i \sqrt {897}}{39}\right )-25740 \sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}\, \sqrt {13}\, \sqrt {3}\, \sqrt {\frac {-5+2 x}{-2+3 x}}\, \sqrt {23}\, \sqrt {\frac {1+4 x}{-2+3 x}}\, E\left (\frac {\sqrt {-\frac {253 \left (7+5 x \right )}{-2+3 x}}}{23}, \frac {i \sqrt {897}}{39}\right )-17760600 x^{3}+15096510 x^{2}+67046265 x +15540525\right )}{1480050 \left (120 x^{4}-182 x^{3}-385 x^{2}+197 x +70\right )}\) | \(821\) |
(-(7+5*x)*(-2+3*x)*(-5+2*x)*(1+4*x))^(1/2)/(2-3*x)^(1/2)/(-5+2*x)^(1/2)/(1 +4*x)^(1/2)/(7+5*x)^(1/2)*(4/305877*(-3795*(x+7/5)/(-2/3+x))^(1/2)*(-2/3+x )^2*806^(1/2)*((x-5/2)/(-2/3+x))^(1/2)*2139^(1/2)*((x+1/4)/(-2/3+x))^(1/2) /(-30*(x+7/5)*(-2/3+x)*(x-5/2)*(x+1/4))^(1/2)*EllipticF(1/69*(-3795*(x+7/5 )/(-2/3+x))^(1/2),1/39*I*897^(1/2))+10/305877*(-3795*(x+7/5)/(-2/3+x))^(1/ 2)*(-2/3+x)^2*806^(1/2)*((x-5/2)/(-2/3+x))^(1/2)*2139^(1/2)*((x+1/4)/(-2/3 +x))^(1/2)/(-30*(x+7/5)*(-2/3+x)*(x-5/2)*(x+1/4))^(1/2)*(2/3*EllipticF(1/6 9*(-3795*(x+7/5)/(-2/3+x))^(1/2),1/39*I*897^(1/2))-31/15*EllipticPi(1/69*( -3795*(x+7/5)/(-2/3+x))^(1/2),-69/55,1/39*I*897^(1/2)))-6*((x+7/5)*(x-5/2) *(x+1/4)-1/80730*(-3795*(x+7/5)/(-2/3+x))^(1/2)*(-2/3+x)^2*806^(1/2)*((x-5 /2)/(-2/3+x))^(1/2)*2139^(1/2)*((x+1/4)/(-2/3+x))^(1/2)*(181/341*EllipticF (1/69*(-3795*(x+7/5)/(-2/3+x))^(1/2),1/39*I*897^(1/2))-117/62*EllipticE(1/ 69*(-3795*(x+7/5)/(-2/3+x))^(1/2),1/39*I*897^(1/2))+91/55*EllipticPi(1/69* (-3795*(x+7/5)/(-2/3+x))^(1/2),-69/55,1/39*I*897^(1/2))))/(-30*(x+7/5)*(-2 /3+x)*(x-5/2)*(x+1/4))^(1/2))
\[ \int \frac {\sqrt {2-3 x} \sqrt {1+4 x}}{\sqrt {-5+2 x} \sqrt {7+5 x}} \, dx=\int { \frac {\sqrt {4 \, x + 1} \sqrt {-3 \, x + 2}}{\sqrt {5 \, x + 7} \sqrt {2 \, x - 5}} \,d x } \]
\[ \int \frac {\sqrt {2-3 x} \sqrt {1+4 x}}{\sqrt {-5+2 x} \sqrt {7+5 x}} \, dx=\int \frac {\sqrt {2 - 3 x} \sqrt {4 x + 1}}{\sqrt {2 x - 5} \sqrt {5 x + 7}}\, dx \]
\[ \int \frac {\sqrt {2-3 x} \sqrt {1+4 x}}{\sqrt {-5+2 x} \sqrt {7+5 x}} \, dx=\int { \frac {\sqrt {4 \, x + 1} \sqrt {-3 \, x + 2}}{\sqrt {5 \, x + 7} \sqrt {2 \, x - 5}} \,d x } \]
\[ \int \frac {\sqrt {2-3 x} \sqrt {1+4 x}}{\sqrt {-5+2 x} \sqrt {7+5 x}} \, dx=\int { \frac {\sqrt {4 \, x + 1} \sqrt {-3 \, x + 2}}{\sqrt {5 \, x + 7} \sqrt {2 \, x - 5}} \,d x } \]
Timed out. \[ \int \frac {\sqrt {2-3 x} \sqrt {1+4 x}}{\sqrt {-5+2 x} \sqrt {7+5 x}} \, dx=\int \frac {\sqrt {2-3\,x}\,\sqrt {4\,x+1}}{\sqrt {2\,x-5}\,\sqrt {5\,x+7}} \,d x \]