Integrand size = 34, antiderivative size = 177 \[ \int \frac {x^2 \sqrt {a x+\sqrt {-b+a x}}}{\sqrt {-b+a x}} \, dx=\frac {\left (315-648 b-400 b^2+168 a x-160 a b x+128 a^2 x^2\right ) \sqrt {a x+\sqrt {-b+a x}}}{3840 a^3}+\frac {\sqrt {-b+a x} \left (-105+120 b+1200 b^2-72 a x+800 a b x+640 a^2 x^2\right ) \sqrt {a x+\sqrt {-b+a x}}}{1920 a^3}+\frac {\left (21-60 b-16 b^2-320 b^3\right ) \log \left (1+2 \sqrt {-b+a x}-2 \sqrt {a x+\sqrt {-b+a x}}\right )}{512 a^3} \]
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Time = 0.54 (sec) , antiderivative size = 255, normalized size of antiderivative = 1.44, number of steps used = 8, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.147, Rules used = {1675, 654, 626, 635, 212} \[ \int \frac {x^2 \sqrt {a x+\sqrt {-b+a x}}}{\sqrt {-b+a x}} \, dx=-\frac {(1-4 b) \left (80 b^2+24 b+21\right ) \text {arctanh}\left (\frac {2 \sqrt {a x-b}+1}{2 \sqrt {\sqrt {a x-b}+a x}}\right )}{512 a^3}+\frac {\left (80 b^2+24 b+21\right ) \left (2 \sqrt {a x-b}+1\right ) \sqrt {\sqrt {a x-b}+a x}}{256 a^3}+\frac {(a x-b)^{3/2} \left (\sqrt {a x-b}+a x\right )^{3/2}}{3 a^3}-\frac {(68 b+35) \left (\sqrt {a x-b}+a x\right )^{3/2}}{160 a^3}+\frac {3 (b-a x) \left (\sqrt {a x-b}+a x\right )^{3/2}}{10 a^3}+\frac {3 (20 b+7) \sqrt {a x-b} \left (\sqrt {a x-b}+a x\right )^{3/2}}{80 a^3} \]
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Rule 212
Rule 626
Rule 635
Rule 654
Rule 1675
Rubi steps \begin{align*} \text {integral}& = \frac {2 \text {Subst}\left (\int \left (b+x^2\right )^2 \sqrt {b+x+x^2} \, dx,x,\sqrt {-b+a x}\right )}{a^3} \\ & = \frac {(-b+a x)^{3/2} \left (a x+\sqrt {-b+a x}\right )^{3/2}}{3 a^3}+\frac {\text {Subst}\left (\int \sqrt {b+x+x^2} \left (6 b^2+9 b x^2-\frac {9 x^3}{2}\right ) \, dx,x,\sqrt {-b+a x}\right )}{3 a^3} \\ & = \frac {3 (b-a x) \left (a x+\sqrt {-b+a x}\right )^{3/2}}{10 a^3}+\frac {(-b+a x)^{3/2} \left (a x+\sqrt {-b+a x}\right )^{3/2}}{3 a^3}+\frac {\text {Subst}\left (\int \sqrt {b+x+x^2} \left (30 b^2+9 b x+\frac {9}{4} (7+20 b) x^2\right ) \, dx,x,\sqrt {-b+a x}\right )}{15 a^3} \\ & = \frac {3 (b-a x) \left (a x+\sqrt {-b+a x}\right )^{3/2}}{10 a^3}+\frac {3 (7+20 b) \sqrt {-b+a x} \left (a x+\sqrt {-b+a x}\right )^{3/2}}{80 a^3}+\frac {(-b+a x)^{3/2} \left (a x+\sqrt {-b+a x}\right )^{3/2}}{3 a^3}+\frac {\text {Subst}\left (\int \left (-\frac {3}{4} (21-100 b) b-\frac {9}{8} (35+68 b) x\right ) \sqrt {b+x+x^2} \, dx,x,\sqrt {-b+a x}\right )}{60 a^3} \\ & = -\frac {(35+68 b) \left (a x+\sqrt {-b+a x}\right )^{3/2}}{160 a^3}+\frac {3 (b-a x) \left (a x+\sqrt {-b+a x}\right )^{3/2}}{10 a^3}+\frac {3 (7+20 b) \sqrt {-b+a x} \left (a x+\sqrt {-b+a x}\right )^{3/2}}{80 a^3}+\frac {(-b+a x)^{3/2} \left (a x+\sqrt {-b+a x}\right )^{3/2}}{3 a^3}+\frac {\left (21+24 b+80 b^2\right ) \text {Subst}\left (\int \sqrt {b+x+x^2} \, dx,x,\sqrt {-b+a x}\right )}{64 a^3} \\ & = -\frac {(35+68 b) \left (a x+\sqrt {-b+a x}\right )^{3/2}}{160 a^3}+\frac {3 (b-a x) \left (a x+\sqrt {-b+a x}\right )^{3/2}}{10 a^3}+\frac {3 (7+20 b) \sqrt {-b+a x} \left (a x+\sqrt {-b+a x}\right )^{3/2}}{80 a^3}+\frac {(-b+a x)^{3/2} \left (a x+\sqrt {-b+a x}\right )^{3/2}}{3 a^3}+\frac {\left (21+24 b+80 b^2\right ) \sqrt {a x+\sqrt {-b+a x}} \left (1+2 \sqrt {-b+a x}\right )}{256 a^3}-\frac {\left ((1-4 b) \left (21+24 b+80 b^2\right )\right ) \text {Subst}\left (\int \frac {1}{\sqrt {b+x+x^2}} \, dx,x,\sqrt {-b+a x}\right )}{512 a^3} \\ & = -\frac {(35+68 b) \left (a x+\sqrt {-b+a x}\right )^{3/2}}{160 a^3}+\frac {3 (b-a x) \left (a x+\sqrt {-b+a x}\right )^{3/2}}{10 a^3}+\frac {3 (7+20 b) \sqrt {-b+a x} \left (a x+\sqrt {-b+a x}\right )^{3/2}}{80 a^3}+\frac {(-b+a x)^{3/2} \left (a x+\sqrt {-b+a x}\right )^{3/2}}{3 a^3}+\frac {\left (21+24 b+80 b^2\right ) \sqrt {a x+\sqrt {-b+a x}} \left (1+2 \sqrt {-b+a x}\right )}{256 a^3}-\frac {\left ((1-4 b) \left (21+24 b+80 b^2\right )\right ) \text {Subst}\left (\int \frac {1}{4-x^2} \, dx,x,\frac {1+2 \sqrt {-b+a x}}{\sqrt {a x+\sqrt {-b+a x}}}\right )}{256 a^3} \\ & = -\frac {(35+68 b) \left (a x+\sqrt {-b+a x}\right )^{3/2}}{160 a^3}+\frac {3 (b-a x) \left (a x+\sqrt {-b+a x}\right )^{3/2}}{10 a^3}+\frac {3 (7+20 b) \sqrt {-b+a x} \left (a x+\sqrt {-b+a x}\right )^{3/2}}{80 a^3}+\frac {(-b+a x)^{3/2} \left (a x+\sqrt {-b+a x}\right )^{3/2}}{3 a^3}+\frac {\left (21+24 b+80 b^2\right ) \sqrt {a x+\sqrt {-b+a x}} \left (1+2 \sqrt {-b+a x}\right )}{256 a^3}-\frac {(1-4 b) \left (21+24 b+80 b^2\right ) \text {arctanh}\left (\frac {1+2 \sqrt {-b+a x}}{2 \sqrt {a x+\sqrt {-b+a x}}}\right )}{512 a^3} \\ \end{align*}
Time = 0.39 (sec) , antiderivative size = 197, normalized size of antiderivative = 1.11 \[ \int \frac {x^2 \sqrt {a x+\sqrt {-b+a x}}}{\sqrt {-b+a x}} \, dx=\frac {2 \sqrt {a x+\sqrt {-b+a x}} \left (315-210 \sqrt {-b+a x}-24 a x \left (-7+6 \sqrt {-b+a x}\right )+400 b^2 \left (-1+6 \sqrt {-b+a x}\right )+128 a^2 x^2 \left (1+10 \sqrt {-b+a x}\right )+8 b \left (-81+30 \sqrt {-b+a x}+20 a x \left (-1+10 \sqrt {-b+a x}\right )\right )\right )-15 \left (-21+60 b+16 b^2+320 b^3\right ) \log \left (-1-2 \sqrt {-b+a x}+2 \sqrt {a x+\sqrt {-b+a x}}\right )}{7680 a^3} \]
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Leaf count of result is larger than twice the leaf count of optimal. \(564\) vs. \(2(155)=310\).
Time = 0.10 (sec) , antiderivative size = 565, normalized size of antiderivative = 3.19
method | result | size |
derivativedivides | \(\frac {2 b^{2} \left (\frac {\left (2 \sqrt {a x -b}+1\right ) \sqrt {a x +\sqrt {a x -b}}}{4}+\frac {\left (4 b -1\right ) \ln \left (\frac {1}{2}+\sqrt {a x -b}+\sqrt {a x +\sqrt {a x -b}}\right )}{8}\right )+\frac {\left (a x -b \right )^{\frac {3}{2}} \left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{3}-\frac {3 \left (a x -b \right ) \left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{10}+\frac {21 \sqrt {a x -b}\, \left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{80}-\frac {7 \left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{32}+\frac {21 \left (2 \sqrt {a x -b}+1\right ) \sqrt {a x +\sqrt {a x -b}}}{256}+\frac {21 \left (4 b -1\right ) \ln \left (\frac {1}{2}+\sqrt {a x -b}+\sqrt {a x +\sqrt {a x -b}}\right )}{512}-\frac {21 b \left (\frac {\left (2 \sqrt {a x -b}+1\right ) \sqrt {a x +\sqrt {a x -b}}}{4}+\frac {\left (4 b -1\right ) \ln \left (\frac {1}{2}+\sqrt {a x -b}+\sqrt {a x +\sqrt {a x -b}}\right )}{8}\right )}{80}+\frac {3 b \left (\frac {\left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{3}-\frac {\left (2 \sqrt {a x -b}+1\right ) \sqrt {a x +\sqrt {a x -b}}}{8}-\frac {\left (4 b -1\right ) \ln \left (\frac {1}{2}+\sqrt {a x -b}+\sqrt {a x +\sqrt {a x -b}}\right )}{16}\right )}{5}+3 b \left (\frac {\sqrt {a x -b}\, \left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{4}-\frac {5 \left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{24}+\frac {5 \left (2 \sqrt {a x -b}+1\right ) \sqrt {a x +\sqrt {a x -b}}}{64}+\frac {5 \left (4 b -1\right ) \ln \left (\frac {1}{2}+\sqrt {a x -b}+\sqrt {a x +\sqrt {a x -b}}\right )}{128}-\frac {b \left (\frac {\left (2 \sqrt {a x -b}+1\right ) \sqrt {a x +\sqrt {a x -b}}}{4}+\frac {\left (4 b -1\right ) \ln \left (\frac {1}{2}+\sqrt {a x -b}+\sqrt {a x +\sqrt {a x -b}}\right )}{8}\right )}{4}\right )}{a^{3}}\) | \(565\) |
default | \(\frac {2 b^{2} \left (\frac {\left (2 \sqrt {a x -b}+1\right ) \sqrt {a x +\sqrt {a x -b}}}{4}+\frac {\left (4 b -1\right ) \ln \left (\frac {1}{2}+\sqrt {a x -b}+\sqrt {a x +\sqrt {a x -b}}\right )}{8}\right )+\frac {\left (a x -b \right )^{\frac {3}{2}} \left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{3}-\frac {3 \left (a x -b \right ) \left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{10}+\frac {21 \sqrt {a x -b}\, \left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{80}-\frac {7 \left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{32}+\frac {21 \left (2 \sqrt {a x -b}+1\right ) \sqrt {a x +\sqrt {a x -b}}}{256}+\frac {21 \left (4 b -1\right ) \ln \left (\frac {1}{2}+\sqrt {a x -b}+\sqrt {a x +\sqrt {a x -b}}\right )}{512}-\frac {21 b \left (\frac {\left (2 \sqrt {a x -b}+1\right ) \sqrt {a x +\sqrt {a x -b}}}{4}+\frac {\left (4 b -1\right ) \ln \left (\frac {1}{2}+\sqrt {a x -b}+\sqrt {a x +\sqrt {a x -b}}\right )}{8}\right )}{80}+\frac {3 b \left (\frac {\left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{3}-\frac {\left (2 \sqrt {a x -b}+1\right ) \sqrt {a x +\sqrt {a x -b}}}{8}-\frac {\left (4 b -1\right ) \ln \left (\frac {1}{2}+\sqrt {a x -b}+\sqrt {a x +\sqrt {a x -b}}\right )}{16}\right )}{5}+3 b \left (\frac {\sqrt {a x -b}\, \left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{4}-\frac {5 \left (a x +\sqrt {a x -b}\right )^{\frac {3}{2}}}{24}+\frac {5 \left (2 \sqrt {a x -b}+1\right ) \sqrt {a x +\sqrt {a x -b}}}{64}+\frac {5 \left (4 b -1\right ) \ln \left (\frac {1}{2}+\sqrt {a x -b}+\sqrt {a x +\sqrt {a x -b}}\right )}{128}-\frac {b \left (\frac {\left (2 \sqrt {a x -b}+1\right ) \sqrt {a x +\sqrt {a x -b}}}{4}+\frac {\left (4 b -1\right ) \ln \left (\frac {1}{2}+\sqrt {a x -b}+\sqrt {a x +\sqrt {a x -b}}\right )}{8}\right )}{4}\right )}{a^{3}}\) | \(565\) |
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Timed out. \[ \int \frac {x^2 \sqrt {a x+\sqrt {-b+a x}}}{\sqrt {-b+a x}} \, dx=\text {Timed out} \]
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Time = 0.58 (sec) , antiderivative size = 299, normalized size of antiderivative = 1.69 \[ \int \frac {x^2 \sqrt {a x+\sqrt {-b+a x}}}{\sqrt {-b+a x}} \, dx=\begin {cases} \frac {2 \left (\sqrt {a x + \sqrt {a x - b}} \left (- \frac {5 b^{2}}{4} - 2 b \left (\frac {b}{80} + \frac {7}{320}\right ) + \frac {9 b \left (\frac {13 b}{24} - \frac {3}{160}\right )}{4} + \frac {3 b}{128} + \left (\frac {b}{80} + \frac {7}{320}\right ) \left (a x - b\right ) + \left (\frac {13 b}{24} - \frac {3}{160}\right ) \left (a x - b\right )^{\frac {3}{2}} + \frac {\left (a x - b\right )^{\frac {5}{2}}}{6} + \sqrt {a x - b} \left (\frac {3 b^{2}}{2} - \frac {3 b \left (\frac {13 b}{24} - \frac {3}{160}\right )}{2} - \frac {b}{64} - \frac {7}{256}\right ) + \frac {\left (a x - b\right )^{2}}{60} + \frac {21}{512}\right ) + \left (b^{3} + \frac {5 b^{2}}{8} + b \left (\frac {b}{80} + \frac {7}{320}\right ) - \frac {9 b \left (\frac {13 b}{24} - \frac {3}{160}\right )}{8} - b \left (\frac {3 b^{2}}{2} - \frac {3 b \left (\frac {13 b}{24} - \frac {3}{160}\right )}{2} - \frac {b}{64} - \frac {7}{256}\right ) - \frac {3 b}{256} - \frac {21}{1024}\right ) \left (\begin {cases} \log {\left (2 \sqrt {a x - b} + 2 \sqrt {a x + \sqrt {a x - b}} + 1 \right )} & \text {for}\: b \neq \frac {1}{4} \\\frac {\left (\sqrt {a x - b} + \frac {1}{2}\right ) \log {\left (\sqrt {a x - b} + \frac {1}{2} \right )}}{\sqrt {\left (\sqrt {a x - b} + \frac {1}{2}\right )^{2}}} & \text {otherwise} \end {cases}\right )\right )}{a^{3}} & \text {for}\: a \neq 0 \\\frac {x^{3}}{3 \sqrt [4]{- b}} & \text {otherwise} \end {cases} \]
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\[ \int \frac {x^2 \sqrt {a x+\sqrt {-b+a x}}}{\sqrt {-b+a x}} \, dx=\int { \frac {\sqrt {a x + \sqrt {a x - b}} x^{2}}{\sqrt {a x - b}} \,d x } \]
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Time = 0.65 (sec) , antiderivative size = 224, normalized size of antiderivative = 1.27 \[ \int \frac {x^2 \sqrt {a x+\sqrt {-b+a x}}}{\sqrt {-b+a x}} \, dx=\frac {2 \, \sqrt {a x + \sqrt {a x - b}} {\left (2 \, \sqrt {a x - b} {\left (4 \, \sqrt {a x - b} {\left (2 \, \sqrt {a x - b} {\left (8 \, \sqrt {a x - b} {\left (\frac {10 \, \sqrt {a x - b}}{a^{2}} + \frac {1}{a^{2}}\right )} + \frac {260 \, a^{12} b - 9 \, a^{12}}{a^{14}}\right )} + \frac {3 \, {\left (4 \, a^{12} b + 7 \, a^{12}\right )}}{a^{14}}\right )} + \frac {3 \, {\left (880 \, a^{12} b^{2} + 16 \, a^{12} b - 35 \, a^{12}\right )}}{a^{14}}\right )} - \frac {3 \, {\left (144 \, a^{12} b^{2} + 160 \, a^{12} b - 105 \, a^{12}\right )}}{a^{14}}\right )} - \frac {15 \, {\left (320 \, b^{3} + 16 \, b^{2} + 60 \, b - 21\right )} \log \left ({\left | -2 \, \sqrt {a x - b} + 2 \, \sqrt {a x + \sqrt {a x - b}} - 1 \right |}\right )}{a^{2}}}{7680 \, a} \]
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Timed out. \[ \int \frac {x^2 \sqrt {a x+\sqrt {-b+a x}}}{\sqrt {-b+a x}} \, dx=\int \frac {x^2\,\sqrt {a\,x+\sqrt {a\,x-b}}}{\sqrt {a\,x-b}} \,d x \]
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