Integrand size = 16, antiderivative size = 32 \[ \int \frac {1}{x^3 \left (1-2 x^4+x^8\right )} \, dx=-\frac {3}{4 x^2}+\frac {1}{4 x^2 \left (1-x^4\right )}+\frac {3 \text {arctanh}\left (x^2\right )}{4} \]
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Time = 0.01 (sec) , antiderivative size = 32, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.312, Rules used = {28, 281, 296, 331, 213} \[ \int \frac {1}{x^3 \left (1-2 x^4+x^8\right )} \, dx=\frac {3 \text {arctanh}\left (x^2\right )}{4}-\frac {3}{4 x^2}+\frac {1}{4 x^2 \left (1-x^4\right )} \]
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Rule 28
Rule 213
Rule 281
Rule 296
Rule 331
Rubi steps \begin{align*} \text {integral}& = \int \frac {1}{x^3 \left (-1+x^4\right )^2} \, dx \\ & = \frac {1}{2} \text {Subst}\left (\int \frac {1}{x^2 \left (-1+x^2\right )^2} \, dx,x,x^2\right ) \\ & = \frac {1}{4 x^2 \left (1-x^4\right )}-\frac {3}{4} \text {Subst}\left (\int \frac {1}{x^2 \left (-1+x^2\right )} \, dx,x,x^2\right ) \\ & = -\frac {3}{4 x^2}+\frac {1}{4 x^2 \left (1-x^4\right )}-\frac {3}{4} \text {Subst}\left (\int \frac {1}{-1+x^2} \, dx,x,x^2\right ) \\ & = -\frac {3}{4 x^2}+\frac {1}{4 x^2 \left (1-x^4\right )}+\frac {3}{4} \tanh ^{-1}\left (x^2\right ) \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 41, normalized size of antiderivative = 1.28 \[ \int \frac {1}{x^3 \left (1-2 x^4+x^8\right )} \, dx=\frac {1}{8} \left (\frac {4-6 x^4}{x^2 \left (-1+x^4\right )}-3 \log \left (1-x^2\right )+3 \log \left (1+x^2\right )\right ) \]
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Time = 0.06 (sec) , antiderivative size = 36, normalized size of antiderivative = 1.12
method | result | size |
risch | \(\frac {\frac {1}{2}-\frac {3 x^{4}}{4}}{x^{2} \left (x^{4}-1\right )}-\frac {3 \ln \left (x^{2}-1\right )}{8}+\frac {3 \ln \left (x^{2}+1\right )}{8}\) | \(36\) |
norman | \(\frac {\frac {1}{2}-\frac {3 x^{4}}{4}}{x^{2} \left (x^{4}-1\right )}-\frac {3 \ln \left (x -1\right )}{8}-\frac {3 \ln \left (x +1\right )}{8}+\frac {3 \ln \left (x^{2}+1\right )}{8}\) | \(40\) |
default | \(-\frac {1}{2 x^{2}}+\frac {1}{16 x +16}-\frac {3 \ln \left (x +1\right )}{8}+\frac {3 \ln \left (x^{2}+1\right )}{8}-\frac {1}{8 \left (x^{2}+1\right )}-\frac {1}{16 \left (x -1\right )}-\frac {3 \ln \left (x -1\right )}{8}\) | \(50\) |
parallelrisch | \(-\frac {3 \ln \left (x -1\right ) x^{6}+3 \ln \left (x +1\right ) x^{6}-3 \ln \left (x^{2}+1\right ) x^{6}-4+6 x^{4}-3 \ln \left (x -1\right ) x^{2}-3 \ln \left (x +1\right ) x^{2}+3 \ln \left (x^{2}+1\right ) x^{2}}{8 x^{2} \left (x^{4}-1\right )}\) | \(78\) |
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Leaf count of result is larger than twice the leaf count of optimal. 54 vs. \(2 (24) = 48\).
Time = 0.23 (sec) , antiderivative size = 54, normalized size of antiderivative = 1.69 \[ \int \frac {1}{x^3 \left (1-2 x^4+x^8\right )} \, dx=-\frac {6 \, x^{4} - 3 \, {\left (x^{6} - x^{2}\right )} \log \left (x^{2} + 1\right ) + 3 \, {\left (x^{6} - x^{2}\right )} \log \left (x^{2} - 1\right ) - 4}{8 \, {\left (x^{6} - x^{2}\right )}} \]
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Time = 0.07 (sec) , antiderivative size = 36, normalized size of antiderivative = 1.12 \[ \int \frac {1}{x^3 \left (1-2 x^4+x^8\right )} \, dx=\frac {2 - 3 x^{4}}{4 x^{6} - 4 x^{2}} - \frac {3 \log {\left (x^{2} - 1 \right )}}{8} + \frac {3 \log {\left (x^{2} + 1 \right )}}{8} \]
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none
Time = 0.18 (sec) , antiderivative size = 37, normalized size of antiderivative = 1.16 \[ \int \frac {1}{x^3 \left (1-2 x^4+x^8\right )} \, dx=-\frac {3 \, x^{4} - 2}{4 \, {\left (x^{6} - x^{2}\right )}} + \frac {3}{8} \, \log \left (x^{2} + 1\right ) - \frac {3}{8} \, \log \left (x^{2} - 1\right ) \]
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none
Time = 0.32 (sec) , antiderivative size = 38, normalized size of antiderivative = 1.19 \[ \int \frac {1}{x^3 \left (1-2 x^4+x^8\right )} \, dx=-\frac {3 \, x^{4} - 2}{4 \, {\left (x^{6} - x^{2}\right )}} + \frac {3}{8} \, \log \left (x^{2} + 1\right ) - \frac {3}{8} \, \log \left ({\left | x^{2} - 1 \right |}\right ) \]
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Time = 0.03 (sec) , antiderivative size = 26, normalized size of antiderivative = 0.81 \[ \int \frac {1}{x^3 \left (1-2 x^4+x^8\right )} \, dx=\frac {3\,\mathrm {atanh}\left (x^2\right )}{4}+\frac {\frac {3\,x^4}{4}-\frac {1}{2}}{x^2-x^6} \]
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