Integrand size = 14, antiderivative size = 24 \[ \int \frac {x^2}{-2+x^2+x^4} \, dx=\frac {1}{3} \sqrt {2} \arctan \left (\frac {x}{\sqrt {2}}\right )-\frac {\text {arctanh}(x)}{3} \]
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Time = 0.01 (sec) , antiderivative size = 24, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.214, Rules used = {1144, 209, 213} \[ \int \frac {x^2}{-2+x^2+x^4} \, dx=\frac {1}{3} \sqrt {2} \arctan \left (\frac {x}{\sqrt {2}}\right )-\frac {\text {arctanh}(x)}{3} \]
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Rule 209
Rule 213
Rule 1144
Rubi steps \begin{align*} \text {integral}& = \frac {1}{3} \int \frac {1}{-1+x^2} \, dx+\frac {2}{3} \int \frac {1}{2+x^2} \, dx \\ & = \frac {1}{3} \sqrt {2} \arctan \left (\frac {x}{\sqrt {2}}\right )-\frac {\text {arctanh}(x)}{3} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 32, normalized size of antiderivative = 1.33 \[ \int \frac {x^2}{-2+x^2+x^4} \, dx=\frac {1}{6} \left (2 \sqrt {2} \arctan \left (\frac {x}{\sqrt {2}}\right )+\log (1-x)-\log (1+x)\right ) \]
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Time = 0.05 (sec) , antiderivative size = 26, normalized size of antiderivative = 1.08
method | result | size |
default | \(\frac {\ln \left (-1+x \right )}{6}+\frac {\arctan \left (\frac {x \sqrt {2}}{2}\right ) \sqrt {2}}{3}-\frac {\ln \left (1+x \right )}{6}\) | \(26\) |
risch | \(\frac {\ln \left (-1+x \right )}{6}+\frac {\arctan \left (\frac {x \sqrt {2}}{2}\right ) \sqrt {2}}{3}-\frac {\ln \left (1+x \right )}{6}\) | \(26\) |
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Time = 0.24 (sec) , antiderivative size = 25, normalized size of antiderivative = 1.04 \[ \int \frac {x^2}{-2+x^2+x^4} \, dx=\frac {1}{3} \, \sqrt {2} \arctan \left (\frac {1}{2} \, \sqrt {2} x\right ) - \frac {1}{6} \, \log \left (x + 1\right ) + \frac {1}{6} \, \log \left (x - 1\right ) \]
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Time = 0.06 (sec) , antiderivative size = 29, normalized size of antiderivative = 1.21 \[ \int \frac {x^2}{-2+x^2+x^4} \, dx=\frac {\log {\left (x - 1 \right )}}{6} - \frac {\log {\left (x + 1 \right )}}{6} + \frac {\sqrt {2} \operatorname {atan}{\left (\frac {\sqrt {2} x}{2} \right )}}{3} \]
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Time = 0.31 (sec) , antiderivative size = 25, normalized size of antiderivative = 1.04 \[ \int \frac {x^2}{-2+x^2+x^4} \, dx=\frac {1}{3} \, \sqrt {2} \arctan \left (\frac {1}{2} \, \sqrt {2} x\right ) - \frac {1}{6} \, \log \left (x + 1\right ) + \frac {1}{6} \, \log \left (x - 1\right ) \]
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Time = 0.28 (sec) , antiderivative size = 27, normalized size of antiderivative = 1.12 \[ \int \frac {x^2}{-2+x^2+x^4} \, dx=\frac {1}{3} \, \sqrt {2} \arctan \left (\frac {1}{2} \, \sqrt {2} x\right ) - \frac {1}{6} \, \log \left ({\left | x + 1 \right |}\right ) + \frac {1}{6} \, \log \left ({\left | x - 1 \right |}\right ) \]
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Time = 0.07 (sec) , antiderivative size = 17, normalized size of antiderivative = 0.71 \[ \int \frac {x^2}{-2+x^2+x^4} \, dx=\frac {\sqrt {2}\,\mathrm {atan}\left (\frac {\sqrt {2}\,x}{2}\right )}{3}-\frac {\mathrm {atanh}\left (x\right )}{3} \]
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