Integrand size = 13, antiderivative size = 35 \[ \int x^2 \sqrt {-2+x^6} \, dx=\frac {1}{6} x^3 \sqrt {-2+x^6}-\frac {1}{3} \text {arctanh}\left (\frac {x^3}{\sqrt {-2+x^6}}\right ) \]
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Time = 0.01 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.308, Rules used = {281, 201, 223, 212} \[ \int x^2 \sqrt {-2+x^6} \, dx=\frac {1}{6} x^3 \sqrt {x^6-2}-\frac {1}{3} \text {arctanh}\left (\frac {x^3}{\sqrt {x^6-2}}\right ) \]
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Rule 201
Rule 212
Rule 223
Rule 281
Rubi steps \begin{align*} \text {integral}& = \frac {1}{3} \text {Subst}\left (\int \sqrt {-2+x^2} \, dx,x,x^3\right ) \\ & = \frac {1}{6} x^3 \sqrt {-2+x^6}-\frac {1}{3} \text {Subst}\left (\int \frac {1}{\sqrt {-2+x^2}} \, dx,x,x^3\right ) \\ & = \frac {1}{6} x^3 \sqrt {-2+x^6}-\frac {1}{3} \text {Subst}\left (\int \frac {1}{1-x^2} \, dx,x,\frac {x^3}{\sqrt {-2+x^6}}\right ) \\ & = \frac {1}{6} x^3 \sqrt {-2+x^6}-\frac {1}{3} \tanh ^{-1}\left (\frac {x^3}{\sqrt {-2+x^6}}\right ) \\ \end{align*}
Time = 0.13 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.00 \[ \int x^2 \sqrt {-2+x^6} \, dx=\frac {1}{6} x^3 \sqrt {-2+x^6}-\frac {1}{3} \log \left (x^3+\sqrt {-2+x^6}\right ) \]
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Time = 4.76 (sec) , antiderivative size = 28, normalized size of antiderivative = 0.80
method | result | size |
pseudoelliptic | \(\frac {x^{3} \sqrt {x^{6}-2}}{6}-\frac {\ln \left (x^{3}+\sqrt {x^{6}-2}\right )}{3}\) | \(28\) |
trager | \(\frac {x^{3} \sqrt {x^{6}-2}}{6}+\frac {\ln \left (x^{3}-\sqrt {x^{6}-2}\right )}{3}\) | \(30\) |
risch | \(\frac {x^{3} \sqrt {x^{6}-2}}{6}-\frac {\sqrt {-\operatorname {signum}\left (-1+\frac {x^{6}}{2}\right )}\, \arcsin \left (\frac {x^{3} \sqrt {2}}{2}\right )}{3 \sqrt {\operatorname {signum}\left (-1+\frac {x^{6}}{2}\right )}}\) | \(47\) |
meijerg | \(\frac {i \sqrt {\operatorname {signum}\left (-1+\frac {x^{6}}{2}\right )}\, \left (-i \sqrt {\pi }\, x^{3} \sqrt {2}\, \sqrt {-\frac {x^{6}}{2}+1}-2 i \sqrt {\pi }\, \arcsin \left (\frac {x^{3} \sqrt {2}}{2}\right )\right )}{6 \sqrt {\pi }\, \sqrt {-\operatorname {signum}\left (-1+\frac {x^{6}}{2}\right )}}\) | \(66\) |
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Time = 0.30 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.83 \[ \int x^2 \sqrt {-2+x^6} \, dx=\frac {1}{6} \, \sqrt {x^{6} - 2} x^{3} + \frac {1}{3} \, \log \left (-x^{3} + \sqrt {x^{6} - 2}\right ) \]
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Result contains complex when optimal does not.
Time = 0.92 (sec) , antiderivative size = 88, normalized size of antiderivative = 2.51 \[ \int x^2 \sqrt {-2+x^6} \, dx=\begin {cases} \frac {x^{9}}{6 \sqrt {x^{6} - 2}} - \frac {x^{3}}{3 \sqrt {x^{6} - 2}} - \frac {\operatorname {acosh}{\left (\frac {\sqrt {2} x^{3}}{2} \right )}}{3} & \text {for}\: \left |{x^{6}}\right | > 2 \\- \frac {i x^{9}}{6 \sqrt {2 - x^{6}}} + \frac {i x^{3}}{3 \sqrt {2 - x^{6}}} + \frac {i \operatorname {asin}{\left (\frac {\sqrt {2} x^{3}}{2} \right )}}{3} & \text {otherwise} \end {cases} \]
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Leaf count of result is larger than twice the leaf count of optimal. 58 vs. \(2 (27) = 54\).
Time = 0.19 (sec) , antiderivative size = 58, normalized size of antiderivative = 1.66 \[ \int x^2 \sqrt {-2+x^6} \, dx=-\frac {\sqrt {x^{6} - 2}}{3 \, x^{3} {\left (\frac {x^{6} - 2}{x^{6}} - 1\right )}} - \frac {1}{6} \, \log \left (\frac {\sqrt {x^{6} - 2}}{x^{3}} + 1\right ) + \frac {1}{6} \, \log \left (\frac {\sqrt {x^{6} - 2}}{x^{3}} - 1\right ) \]
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Time = 0.27 (sec) , antiderivative size = 30, normalized size of antiderivative = 0.86 \[ \int x^2 \sqrt {-2+x^6} \, dx=\frac {1}{6} \, \sqrt {x^{6} - 2} x^{3} + \frac {1}{3} \, \log \left ({\left | -x^{3} + \sqrt {x^{6} - 2} \right |}\right ) \]
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Timed out. \[ \int x^2 \sqrt {-2+x^6} \, dx=\int x^2\,\sqrt {x^6-2} \,d x \]
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