Optimal. Leaf size=13 \[ \frac{1}{2} \tan ^{-1}(x)+\frac{1}{2} \tanh ^{-1}(x) \]
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Rubi [A] time = 0.0046864, antiderivative size = 13, normalized size of antiderivative = 1., number of steps used = 5, number of rules used = 5, integrand size = 20, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.25, Rules used = {28, 21, 212, 206, 203} \[ \frac{1}{2} \tan ^{-1}(x)+\frac{1}{2} \tanh ^{-1}(x) \]
Antiderivative was successfully verified.
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Rule 28
Rule 21
Rule 212
Rule 206
Rule 203
Rubi steps
\begin{align*} \int \frac{1-x^4}{1-2 x^4+x^8} \, dx &=\int \frac{1-x^4}{\left (-1+x^4\right )^2} \, dx\\ &=-\int \frac{1}{-1+x^4} \, dx\\ &=\frac{1}{2} \int \frac{1}{1-x^2} \, dx+\frac{1}{2} \int \frac{1}{1+x^2} \, dx\\ &=\frac{1}{2} \tan ^{-1}(x)+\frac{1}{2} \tanh ^{-1}(x)\\ \end{align*}
Mathematica [A] time = 0.0046195, size = 25, normalized size = 1.92 \[ -\frac{1}{4} \log (1-x)+\frac{1}{4} \log (x+1)+\frac{1}{2} \tan ^{-1}(x) \]
Antiderivative was successfully verified.
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Maple [A] time = 0.003, size = 10, normalized size = 0.8 \begin{align*}{\frac{\arctan \left ( x \right ) }{2}}+{\frac{{\it Artanh} \left ( x \right ) }{2}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.47873, size = 23, normalized size = 1.77 \begin{align*} \frac{1}{2} \, \arctan \left (x\right ) + \frac{1}{4} \, \log \left (x + 1\right ) - \frac{1}{4} \, \log \left (x - 1\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.30202, size = 66, normalized size = 5.08 \begin{align*} \frac{1}{2} \, \arctan \left (x\right ) + \frac{1}{4} \, \log \left (x + 1\right ) - \frac{1}{4} \, \log \left (x - 1\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [B] time = 0.123423, size = 17, normalized size = 1.31 \begin{align*} - \frac{\log{\left (x - 1 \right )}}{4} + \frac{\log{\left (x + 1 \right )}}{4} + \frac{\operatorname{atan}{\left (x \right )}}{2} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [B] time = 1.12839, size = 26, normalized size = 2. \begin{align*} \frac{1}{2} \, \arctan \left (x\right ) + \frac{1}{4} \, \log \left ({\left | x + 1 \right |}\right ) - \frac{1}{4} \, \log \left ({\left | x - 1 \right |}\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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