Integrand size = 13, antiderivative size = 24 \[ \int \frac {1}{x^3 \left (1-x^8\right )} \, dx=-\frac {1}{2 x^2}-\frac {\arctan \left (x^2\right )}{4}+\frac {\text {arctanh}\left (x^2\right )}{4} \]
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Time = 0.01 (sec) , antiderivative size = 24, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.385, Rules used = {281, 331, 304, 209, 212} \[ \int \frac {1}{x^3 \left (1-x^8\right )} \, dx=-\frac {1}{4} \arctan \left (x^2\right )+\frac {\text {arctanh}\left (x^2\right )}{4}-\frac {1}{2 x^2} \]
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Rule 209
Rule 212
Rule 281
Rule 304
Rule 331
Rubi steps \begin{align*} \text {integral}& = \frac {1}{2} \text {Subst}\left (\int \frac {1}{x^2 \left (1-x^4\right )} \, dx,x,x^2\right ) \\ & = -\frac {1}{2 x^2}+\frac {1}{2} \text {Subst}\left (\int \frac {x^2}{1-x^4} \, dx,x,x^2\right ) \\ & = -\frac {1}{2 x^2}+\frac {1}{4} \text {Subst}\left (\int \frac {1}{1-x^2} \, dx,x,x^2\right )-\frac {1}{4} \text {Subst}\left (\int \frac {1}{1+x^2} \, dx,x,x^2\right ) \\ & = -\frac {1}{2 x^2}-\frac {1}{4} \tan ^{-1}\left (x^2\right )+\frac {1}{4} \tanh ^{-1}\left (x^2\right ) \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 38, normalized size of antiderivative = 1.58 \[ \int \frac {1}{x^3 \left (1-x^8\right )} \, dx=-\frac {1}{2 x^2}+\frac {1}{4} \arctan \left (\frac {1}{x^2}\right )-\frac {1}{8} \log \left (1-x^2\right )+\frac {1}{8} \log \left (1+x^2\right ) \]
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Time = 5.50 (sec) , antiderivative size = 29, normalized size of antiderivative = 1.21
method | result | size |
risch | \(-\frac {1}{2 x^{2}}-\frac {\arctan \left (x^{2}\right )}{4}-\frac {\ln \left (x^{2}-1\right )}{8}+\frac {\ln \left (x^{2}+1\right )}{8}\) | \(29\) |
default | \(-\frac {\ln \left (-1+x \right )}{8}-\frac {\ln \left (1+x \right )}{8}+\frac {\ln \left (x^{2}+1\right )}{8}-\frac {\arctan \left (x^{2}\right )}{4}-\frac {1}{2 x^{2}}\) | \(33\) |
meijerg | \(\frac {\left (-1\right )^{\frac {1}{4}} \left (\frac {4 \left (-1\right )^{\frac {3}{4}}}{x^{2}}+\frac {x^{6} \left (-1\right )^{\frac {3}{4}} \left (\ln \left (1-\left (x^{8}\right )^{\frac {1}{4}}\right )-\ln \left (1+\left (x^{8}\right )^{\frac {1}{4}}\right )+2 \arctan \left (\left (x^{8}\right )^{\frac {1}{4}}\right )\right )}{\left (x^{8}\right )^{\frac {3}{4}}}\right )}{8}\) | \(56\) |
parallelrisch | \(\frac {i \ln \left (x^{2}-i\right ) x^{2}-i \ln \left (x^{2}+i\right ) x^{2}-\ln \left (1+x \right ) x^{2}-\ln \left (-1+x \right ) x^{2}+\ln \left (x -i\right ) x^{2}+\ln \left (x +i\right ) x^{2}-4}{8 x^{2}}\) | \(70\) |
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Leaf count of result is larger than twice the leaf count of optimal. 37 vs. \(2 (18) = 36\).
Time = 0.29 (sec) , antiderivative size = 37, normalized size of antiderivative = 1.54 \[ \int \frac {1}{x^3 \left (1-x^8\right )} \, dx=-\frac {2 \, x^{2} \arctan \left (x^{2}\right ) - x^{2} \log \left (x^{2} + 1\right ) + x^{2} \log \left (x^{2} - 1\right ) + 4}{8 \, x^{2}} \]
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Time = 0.08 (sec) , antiderivative size = 29, normalized size of antiderivative = 1.21 \[ \int \frac {1}{x^3 \left (1-x^8\right )} \, dx=- \frac {\log {\left (x^{2} - 1 \right )}}{8} + \frac {\log {\left (x^{2} + 1 \right )}}{8} - \frac {\operatorname {atan}{\left (x^{2} \right )}}{4} - \frac {1}{2 x^{2}} \]
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Time = 0.28 (sec) , antiderivative size = 28, normalized size of antiderivative = 1.17 \[ \int \frac {1}{x^3 \left (1-x^8\right )} \, dx=-\frac {1}{2 \, x^{2}} - \frac {1}{4} \, \arctan \left (x^{2}\right ) + \frac {1}{8} \, \log \left (x^{2} + 1\right ) - \frac {1}{8} \, \log \left (x^{2} - 1\right ) \]
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Time = 0.29 (sec) , antiderivative size = 29, normalized size of antiderivative = 1.21 \[ \int \frac {1}{x^3 \left (1-x^8\right )} \, dx=-\frac {1}{2 \, x^{2}} - \frac {1}{4} \, \arctan \left (x^{2}\right ) + \frac {1}{8} \, \log \left (x^{2} + 1\right ) - \frac {1}{8} \, \log \left ({\left | x^{2} - 1 \right |}\right ) \]
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Time = 0.05 (sec) , antiderivative size = 18, normalized size of antiderivative = 0.75 \[ \int \frac {1}{x^3 \left (1-x^8\right )} \, dx=\frac {\mathrm {atanh}\left (x^2\right )}{4}-\frac {\mathrm {atan}\left (x^2\right )}{4}-\frac {1}{2\,x^2} \]
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