Integrand size = 25, antiderivative size = 228 \[ \int \frac {(2-5 x) \sqrt {2+5 x+3 x^2}}{x^{11/2}} \, dx=-\frac {1331 \sqrt {x} (2+3 x)}{630 \sqrt {2+5 x+3 x^2}}-\frac {4 (7-20 x) \sqrt {2+5 x+3 x^2}}{63 x^{9/2}}+\frac {97 \sqrt {2+5 x+3 x^2}}{105 x^{5/2}}-\frac {79 \sqrt {2+5 x+3 x^2}}{63 x^{3/2}}+\frac {1331 \sqrt {2+5 x+3 x^2}}{630 \sqrt {x}}+\frac {1331 (1+x) \sqrt {\frac {2+3 x}{1+x}} E\left (\arctan \left (\sqrt {x}\right )|-\frac {1}{2}\right )}{315 \sqrt {2} \sqrt {2+5 x+3 x^2}}-\frac {79 (1+x) \sqrt {\frac {2+3 x}{1+x}} \operatorname {EllipticF}\left (\arctan \left (\sqrt {x}\right ),-\frac {1}{2}\right )}{21 \sqrt {2} \sqrt {2+5 x+3 x^2}} \]
-1331/630*(2+3*x)*x^(1/2)/(3*x^2+5*x+2)^(1/2)+1331/630*(1+x)^(3/2)*(1/(1+x ))^(1/2)*EllipticE(x^(1/2)/(1+x)^(1/2),1/2*I*2^(1/2))*2^(1/2)*((2+3*x)/(1+ x))^(1/2)/(3*x^2+5*x+2)^(1/2)-79/42*(1+x)^(3/2)*(1/(1+x))^(1/2)*EllipticF( x^(1/2)/(1+x)^(1/2),1/2*I*2^(1/2))*2^(1/2)*((2+3*x)/(1+x))^(1/2)/(3*x^2+5* x+2)^(1/2)-4/63*(7-20*x)*(3*x^2+5*x+2)^(1/2)/x^(9/2)+97/105*(3*x^2+5*x+2)^ (1/2)/x^(5/2)-79/63*(3*x^2+5*x+2)^(1/2)/x^(3/2)+1331/630*(3*x^2+5*x+2)^(1/ 2)/x^(1/2)
Result contains complex when optimal does not.
Time = 21.14 (sec) , antiderivative size = 160, normalized size of antiderivative = 0.70 \[ \int \frac {(2-5 x) \sqrt {2+5 x+3 x^2}}{x^{11/2}} \, dx=\frac {-560+200 x+4324 x^2+3730 x^3-2204 x^4-2370 x^5-1331 i \sqrt {2} \sqrt {1+\frac {1}{x}} \sqrt {3+\frac {2}{x}} x^{11/2} E\left (i \text {arcsinh}\left (\frac {\sqrt {\frac {2}{3}}}{\sqrt {x}}\right )|\frac {3}{2}\right )+146 i \sqrt {2} \sqrt {1+\frac {1}{x}} \sqrt {3+\frac {2}{x}} x^{11/2} \operatorname {EllipticF}\left (i \text {arcsinh}\left (\frac {\sqrt {\frac {2}{3}}}{\sqrt {x}}\right ),\frac {3}{2}\right )}{630 x^{9/2} \sqrt {2+5 x+3 x^2}} \]
(-560 + 200*x + 4324*x^2 + 3730*x^3 - 2204*x^4 - 2370*x^5 - (1331*I)*Sqrt[ 2]*Sqrt[1 + x^(-1)]*Sqrt[3 + 2/x]*x^(11/2)*EllipticE[I*ArcSinh[Sqrt[2/3]/S qrt[x]], 3/2] + (146*I)*Sqrt[2]*Sqrt[1 + x^(-1)]*Sqrt[3 + 2/x]*x^(11/2)*El lipticF[I*ArcSinh[Sqrt[2/3]/Sqrt[x]], 3/2])/(630*x^(9/2)*Sqrt[2 + 5*x + 3* x^2])
Time = 0.45 (sec) , antiderivative size = 245, normalized size of antiderivative = 1.07, number of steps used = 12, number of rules used = 11, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.440, Rules used = {1229, 27, 1237, 27, 1237, 1237, 27, 1240, 1503, 1413, 1456}
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.
| \(\displaystyle \int \frac {(2-5 x) \sqrt {3 x^2+5 x+2}}{x^{11/2}} \, dx\) |
| \(\Big \downarrow \) 1229 |
| \(\displaystyle -\frac {1}{63} \int \frac {3 (115 x+97)}{x^{7/2} \sqrt {3 x^2+5 x+2}}dx-\frac {4 \sqrt {3 x^2+5 x+2} (7-20 x)}{63 x^{9/2}}\) |
| \(\Big \downarrow \) 27 |
| \(\displaystyle -\frac {1}{21} \int \frac {115 x+97}{x^{7/2} \sqrt {3 x^2+5 x+2}}dx-\frac {4 \sqrt {3 x^2+5 x+2} (7-20 x)}{63 x^{9/2}}\) |
| \(\Big \downarrow \) 1237 |
| \(\displaystyle \frac {1}{21} \left (\frac {1}{5} \int \frac {873 x+790}{2 x^{5/2} \sqrt {3 x^2+5 x+2}}dx+\frac {97 \sqrt {3 x^2+5 x+2}}{5 x^{5/2}}\right )-\frac {4 (7-20 x) \sqrt {3 x^2+5 x+2}}{63 x^{9/2}}\) |
| \(\Big \downarrow \) 27 |
| \(\displaystyle \frac {1}{21} \left (\frac {1}{10} \int \frac {873 x+790}{x^{5/2} \sqrt {3 x^2+5 x+2}}dx+\frac {97 \sqrt {3 x^2+5 x+2}}{5 x^{5/2}}\right )-\frac {4 (7-20 x) \sqrt {3 x^2+5 x+2}}{63 x^{9/2}}\) |
| \(\Big \downarrow \) 1237 |
| \(\displaystyle \frac {1}{21} \left (\frac {1}{10} \left (-\frac {1}{3} \int \frac {1185 x+1331}{x^{3/2} \sqrt {3 x^2+5 x+2}}dx-\frac {790 \sqrt {3 x^2+5 x+2}}{3 x^{3/2}}\right )+\frac {97 \sqrt {3 x^2+5 x+2}}{5 x^{5/2}}\right )-\frac {4 (7-20 x) \sqrt {3 x^2+5 x+2}}{63 x^{9/2}}\) |
| \(\Big \downarrow \) 1237 |
| \(\displaystyle \frac {1}{21} \left (\frac {1}{10} \left (\frac {1}{3} \left (\int -\frac {3 (1331 x+790)}{2 \sqrt {x} \sqrt {3 x^2+5 x+2}}dx+\frac {1331 \sqrt {3 x^2+5 x+2}}{\sqrt {x}}\right )-\frac {790 \sqrt {3 x^2+5 x+2}}{3 x^{3/2}}\right )+\frac {97 \sqrt {3 x^2+5 x+2}}{5 x^{5/2}}\right )-\frac {4 (7-20 x) \sqrt {3 x^2+5 x+2}}{63 x^{9/2}}\) |
| \(\Big \downarrow \) 27 |
| \(\displaystyle \frac {1}{21} \left (\frac {1}{10} \left (\frac {1}{3} \left (\frac {1331 \sqrt {3 x^2+5 x+2}}{\sqrt {x}}-\frac {3}{2} \int \frac {1331 x+790}{\sqrt {x} \sqrt {3 x^2+5 x+2}}dx\right )-\frac {790 \sqrt {3 x^2+5 x+2}}{3 x^{3/2}}\right )+\frac {97 \sqrt {3 x^2+5 x+2}}{5 x^{5/2}}\right )-\frac {4 (7-20 x) \sqrt {3 x^2+5 x+2}}{63 x^{9/2}}\) |
| \(\Big \downarrow \) 1240 |
| \(\displaystyle \frac {1}{21} \left (\frac {1}{10} \left (\frac {1}{3} \left (\frac {1331 \sqrt {3 x^2+5 x+2}}{\sqrt {x}}-3 \int \frac {1331 x+790}{\sqrt {3 x^2+5 x+2}}d\sqrt {x}\right )-\frac {790 \sqrt {3 x^2+5 x+2}}{3 x^{3/2}}\right )+\frac {97 \sqrt {3 x^2+5 x+2}}{5 x^{5/2}}\right )-\frac {4 (7-20 x) \sqrt {3 x^2+5 x+2}}{63 x^{9/2}}\) |
| \(\Big \downarrow \) 1503 |
| \(\displaystyle \frac {1}{21} \left (\frac {1}{10} \left (\frac {1}{3} \left (\frac {1331 \sqrt {3 x^2+5 x+2}}{\sqrt {x}}-3 \left (790 \int \frac {1}{\sqrt {3 x^2+5 x+2}}d\sqrt {x}+1331 \int \frac {x}{\sqrt {3 x^2+5 x+2}}d\sqrt {x}\right )\right )-\frac {790 \sqrt {3 x^2+5 x+2}}{3 x^{3/2}}\right )+\frac {97 \sqrt {3 x^2+5 x+2}}{5 x^{5/2}}\right )-\frac {4 (7-20 x) \sqrt {3 x^2+5 x+2}}{63 x^{9/2}}\) |
| \(\Big \downarrow \) 1413 |
| \(\displaystyle \frac {1}{21} \left (\frac {1}{10} \left (\frac {1}{3} \left (\frac {1331 \sqrt {3 x^2+5 x+2}}{\sqrt {x}}-3 \left (1331 \int \frac {x}{\sqrt {3 x^2+5 x+2}}d\sqrt {x}+\frac {395 \sqrt {2} (x+1) \sqrt {\frac {3 x+2}{x+1}} \operatorname {EllipticF}\left (\arctan \left (\sqrt {x}\right ),-\frac {1}{2}\right )}{\sqrt {3 x^2+5 x+2}}\right )\right )-\frac {790 \sqrt {3 x^2+5 x+2}}{3 x^{3/2}}\right )+\frac {97 \sqrt {3 x^2+5 x+2}}{5 x^{5/2}}\right )-\frac {4 (7-20 x) \sqrt {3 x^2+5 x+2}}{63 x^{9/2}}\) |
| \(\Big \downarrow \) 1456 |
| \(\displaystyle \frac {1}{21} \left (\frac {1}{10} \left (\frac {1}{3} \left (\frac {1331 \sqrt {3 x^2+5 x+2}}{\sqrt {x}}-3 \left (\frac {395 \sqrt {2} (x+1) \sqrt {\frac {3 x+2}{x+1}} \operatorname {EllipticF}\left (\arctan \left (\sqrt {x}\right ),-\frac {1}{2}\right )}{\sqrt {3 x^2+5 x+2}}+1331 \left (\frac {\sqrt {x} (3 x+2)}{3 \sqrt {3 x^2+5 x+2}}-\frac {\sqrt {2} (x+1) \sqrt {\frac {3 x+2}{x+1}} E\left (\arctan \left (\sqrt {x}\right )|-\frac {1}{2}\right )}{3 \sqrt {3 x^2+5 x+2}}\right )\right )\right )-\frac {790 \sqrt {3 x^2+5 x+2}}{3 x^{3/2}}\right )+\frac {97 \sqrt {3 x^2+5 x+2}}{5 x^{5/2}}\right )-\frac {4 (7-20 x) \sqrt {3 x^2+5 x+2}}{63 x^{9/2}}\) |
(-4*(7 - 20*x)*Sqrt[2 + 5*x + 3*x^2])/(63*x^(9/2)) + ((97*Sqrt[2 + 5*x + 3 *x^2])/(5*x^(5/2)) + ((-790*Sqrt[2 + 5*x + 3*x^2])/(3*x^(3/2)) + ((1331*Sq rt[2 + 5*x + 3*x^2])/Sqrt[x] - 3*(1331*((Sqrt[x]*(2 + 3*x))/(3*Sqrt[2 + 5* x + 3*x^2]) - (Sqrt[2]*(1 + x)*Sqrt[(2 + 3*x)/(1 + x)]*EllipticE[ArcTan[Sq rt[x]], -1/2])/(3*Sqrt[2 + 5*x + 3*x^2])) + (395*Sqrt[2]*(1 + x)*Sqrt[(2 + 3*x)/(1 + x)]*EllipticF[ArcTan[Sqrt[x]], -1/2])/Sqrt[2 + 5*x + 3*x^2]))/3 )/10)/21
3.11.43.3.1 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[((d_.) + (e_.)*(x_))^(m_)*((f_.) + (g_.)*(x_))*((a_.) + (b_.)*(x_) + (c _.)*(x_)^2)^(p_.), x_Symbol] :> Simp[(-(d + e*x)^(m + 1))*((a + b*x + c*x^2 )^p/(e^2*(m + 1)*(m + 2)*(c*d^2 - b*d*e + a*e^2)))*((d*g - e*f*(m + 2))*(c* d^2 - b*d*e + a*e^2) - d*p*(2*c*d - b*e)*(e*f - d*g) - e*(g*(m + 1)*(c*d^2 - b*d*e + a*e^2) + p*(2*c*d - b*e)*(e*f - d*g))*x), x] - Simp[p/(e^2*(m + 1 )*(m + 2)*(c*d^2 - b*d*e + a*e^2)) Int[(d + e*x)^(m + 2)*(a + b*x + c*x^2 )^(p - 1)*Simp[2*a*c*e*(e*f - d*g)*(m + 2) + b^2*e*(d*g*(p + 1) - e*f*(m + p + 2)) + b*(a*e^2*g*(m + 1) - c*d*(d*g*(2*p + 1) - e*f*(m + 2*p + 2))) - c *(2*c*d*(d*g*(2*p + 1) - e*f*(m + 2*p + 2)) - e*(2*a*e*g*(m + 1) - b*(d*g*( m - 2*p) + e*f*(m + 2*p + 2))))*x, x], x], x] /; FreeQ[{a, b, c, d, e, f, g }, x] && GtQ[p, 0] && LtQ[m, -2] && LtQ[m + 2*p, 0] && !ILtQ[m + 2*p + 3, 0]
Int[((d_.) + (e_.)*(x_))^(m_)*((f_.) + (g_.)*(x_))*((a_.) + (b_.)*(x_) + (c _.)*(x_)^2)^(p_.), x_Symbol] :> Simp[(e*f - d*g)*(d + e*x)^(m + 1)*((a + b* x + c*x^2)^(p + 1)/((m + 1)*(c*d^2 - b*d*e + a*e^2))), x] + Simp[1/((m + 1) *(c*d^2 - b*d*e + a*e^2)) Int[(d + e*x)^(m + 1)*(a + b*x + c*x^2)^p*Simp[ (c*d*f - f*b*e + a*e*g)*(m + 1) + b*(d*g - e*f)*(p + 1) - c*(e*f - d*g)*(m + 2*p + 3)*x, x], x], x] /; FreeQ[{a, b, c, d, e, f, g, p}, x] && LtQ[m, -1 ] && (IntegerQ[m] || IntegerQ[p] || IntegersQ[2*m, 2*p])
Int[((f_) + (g_.)*(x_))/(Sqrt[x_]*Sqrt[(a_) + (b_.)*(x_) + (c_.)*(x_)^2]), x_Symbol] :> Simp[2 Subst[Int[(f + g*x^2)/Sqrt[a + b*x^2 + c*x^4], x], x, Sqrt[x]], x] /; FreeQ[{a, b, c, f, g}, x]
Int[1/Sqrt[(a_) + (b_.)*(x_)^2 + (c_.)*(x_)^4], x_Symbol] :> With[{q = Rt[b ^2 - 4*a*c, 2]}, Simp[(2*a + (b - q)*x^2)*(Sqrt[(2*a + (b + q)*x^2)/(2*a + (b - q)*x^2)]/(2*a*Rt[(b - q)/(2*a), 2]*Sqrt[a + b*x^2 + c*x^4]))*EllipticF [ArcTan[Rt[(b - q)/(2*a), 2]*x], -2*(q/(b - q))], x] /; PosQ[(b - q)/a]] /; FreeQ[{a, b, c}, x] && GtQ[b^2 - 4*a*c, 0]
Int[(x_)^2/Sqrt[(a_) + (b_.)*(x_)^2 + (c_.)*(x_)^4], x_Symbol] :> With[{q = Rt[b^2 - 4*a*c, 2]}, Simp[x*((b - q + 2*c*x^2)/(2*c*Sqrt[a + b*x^2 + c*x^4 ])), x] - Simp[Rt[(b - q)/(2*a), 2]*(2*a + (b - q)*x^2)*(Sqrt[(2*a + (b + q )*x^2)/(2*a + (b - q)*x^2)]/(2*c*Sqrt[a + b*x^2 + c*x^4]))*EllipticE[ArcTan [Rt[(b - q)/(2*a), 2]*x], -2*(q/(b - q))], x] /; PosQ[(b - q)/a]] /; FreeQ[ {a, b, c}, x] && GtQ[b^2 - 4*a*c, 0]
Int[((d_) + (e_.)*(x_)^2)/Sqrt[(a_) + (b_.)*(x_)^2 + (c_.)*(x_)^4], x_Symbo l] :> With[{q = Rt[b^2 - 4*a*c, 2]}, Simp[d Int[1/Sqrt[a + b*x^2 + c*x^4] , x], x] + Simp[e Int[x^2/Sqrt[a + b*x^2 + c*x^4], x], x] /; PosQ[(b + q) /a] || PosQ[(b - q)/a]] /; FreeQ[{a, b, c, d, e}, x] && GtQ[b^2 - 4*a*c, 0]
Time = 0.28 (sec) , antiderivative size = 134, normalized size of antiderivative = 0.59
| method | result | size |
| default | \(\frac {1623 \sqrt {6 x +4}\, \sqrt {3+3 x}\, \sqrt {6}\, \sqrt {-x}\, F\left (\frac {\sqrt {6 x +4}}{2}, i \sqrt {2}\right ) x^{4}-1331 \sqrt {6 x +4}\, \sqrt {3+3 x}\, \sqrt {6}\, \sqrt {-x}\, E\left (\frac {\sqrt {6 x +4}}{2}, i \sqrt {2}\right ) x^{4}+23958 x^{6}+25710 x^{5}+2748 x^{4}+22380 x^{3}+25944 x^{2}+1200 x -3360}{3780 \sqrt {3 x^{2}+5 x +2}\, x^{\frac {9}{2}}}\) | \(134\) |
| risch | \(\frac {3993 x^{6}+4285 x^{5}+458 x^{4}+3730 x^{3}+4324 x^{2}+200 x -560}{630 x^{\frac {9}{2}} \sqrt {3 x^{2}+5 x +2}}-\frac {\left (\frac {79 \sqrt {6 x +4}\, \sqrt {3+3 x}\, \sqrt {-6 x}\, F\left (\frac {\sqrt {6 x +4}}{2}, i \sqrt {2}\right )}{126 \sqrt {3 x^{3}+5 x^{2}+2 x}}+\frac {1331 \sqrt {6 x +4}\, \sqrt {3+3 x}\, \sqrt {-6 x}\, \left (\frac {E\left (\frac {\sqrt {6 x +4}}{2}, i \sqrt {2}\right )}{3}-F\left (\frac {\sqrt {6 x +4}}{2}, i \sqrt {2}\right )\right )}{1260 \sqrt {3 x^{3}+5 x^{2}+2 x}}\right ) \sqrt {x \left (3 x^{2}+5 x +2\right )}}{\sqrt {x}\, \sqrt {3 x^{2}+5 x +2}}\) | \(208\) |
| elliptic | \(\frac {\sqrt {x \left (3 x^{2}+5 x +2\right )}\, \left (-\frac {4 \sqrt {3 x^{3}+5 x^{2}+2 x}}{9 x^{5}}+\frac {80 \sqrt {3 x^{3}+5 x^{2}+2 x}}{63 x^{4}}+\frac {97 \sqrt {3 x^{3}+5 x^{2}+2 x}}{105 x^{3}}-\frac {79 \sqrt {3 x^{3}+5 x^{2}+2 x}}{63 x^{2}}+\frac {\frac {1331}{210} x^{2}+\frac {1331}{126} x +\frac {1331}{315}}{\sqrt {x \left (3 x^{2}+5 x +2\right )}}-\frac {79 \sqrt {6 x +4}\, \sqrt {3+3 x}\, \sqrt {-6 x}\, F\left (\frac {\sqrt {6 x +4}}{2}, i \sqrt {2}\right )}{126 \sqrt {3 x^{3}+5 x^{2}+2 x}}-\frac {1331 \sqrt {6 x +4}\, \sqrt {3+3 x}\, \sqrt {-6 x}\, \left (\frac {E\left (\frac {\sqrt {6 x +4}}{2}, i \sqrt {2}\right )}{3}-F\left (\frac {\sqrt {6 x +4}}{2}, i \sqrt {2}\right )\right )}{1260 \sqrt {3 x^{3}+5 x^{2}+2 x}}\right )}{\sqrt {x}\, \sqrt {3 x^{2}+5 x +2}}\) | \(269\) |
1/3780*(1623*(6*x+4)^(1/2)*(3+3*x)^(1/2)*6^(1/2)*(-x)^(1/2)*EllipticF(1/2* (6*x+4)^(1/2),I*2^(1/2))*x^4-1331*(6*x+4)^(1/2)*(3+3*x)^(1/2)*6^(1/2)*(-x) ^(1/2)*EllipticE(1/2*(6*x+4)^(1/2),I*2^(1/2))*x^4+23958*x^6+25710*x^5+2748 *x^4+22380*x^3+25944*x^2+1200*x-3360)/(3*x^2+5*x+2)^(1/2)/x^(9/2)
Result contains higher order function than in optimal. Order 9 vs. order 4.
Time = 0.08 (sec) , antiderivative size = 74, normalized size of antiderivative = 0.32 \[ \int \frac {(2-5 x) \sqrt {2+5 x+3 x^2}}{x^{11/2}} \, dx=-\frac {455 \, \sqrt {3} x^{5} {\rm weierstrassPInverse}\left (\frac {28}{27}, \frac {80}{729}, x + \frac {5}{9}\right ) - 11979 \, \sqrt {3} x^{5} {\rm weierstrassZeta}\left (\frac {28}{27}, \frac {80}{729}, {\rm weierstrassPInverse}\left (\frac {28}{27}, \frac {80}{729}, x + \frac {5}{9}\right )\right ) - 9 \, {\left (1331 \, x^{4} - 790 \, x^{3} + 582 \, x^{2} + 800 \, x - 280\right )} \sqrt {3 \, x^{2} + 5 \, x + 2} \sqrt {x}}{5670 \, x^{5}} \]
-1/5670*(455*sqrt(3)*x^5*weierstrassPInverse(28/27, 80/729, x + 5/9) - 119 79*sqrt(3)*x^5*weierstrassZeta(28/27, 80/729, weierstrassPInverse(28/27, 8 0/729, x + 5/9)) - 9*(1331*x^4 - 790*x^3 + 582*x^2 + 800*x - 280)*sqrt(3*x ^2 + 5*x + 2)*sqrt(x))/x^5
\[ \int \frac {(2-5 x) \sqrt {2+5 x+3 x^2}}{x^{11/2}} \, dx=- \int \left (- \frac {2 \sqrt {3 x^{2} + 5 x + 2}}{x^{\frac {11}{2}}}\right )\, dx - \int \frac {5 \sqrt {3 x^{2} + 5 x + 2}}{x^{\frac {9}{2}}}\, dx \]
-Integral(-2*sqrt(3*x**2 + 5*x + 2)/x**(11/2), x) - Integral(5*sqrt(3*x**2 + 5*x + 2)/x**(9/2), x)
\[ \int \frac {(2-5 x) \sqrt {2+5 x+3 x^2}}{x^{11/2}} \, dx=\int { -\frac {\sqrt {3 \, x^{2} + 5 \, x + 2} {\left (5 \, x - 2\right )}}{x^{\frac {11}{2}}} \,d x } \]
\[ \int \frac {(2-5 x) \sqrt {2+5 x+3 x^2}}{x^{11/2}} \, dx=\int { -\frac {\sqrt {3 \, x^{2} + 5 \, x + 2} {\left (5 \, x - 2\right )}}{x^{\frac {11}{2}}} \,d x } \]
Timed out. \[ \int \frac {(2-5 x) \sqrt {2+5 x+3 x^2}}{x^{11/2}} \, dx=\int -\frac {\left (5\,x-2\right )\,\sqrt {3\,x^2+5\,x+2}}{x^{11/2}} \,d x \]