Optimal. Leaf size=13 \[ -\frac{1}{3 x^3}+\frac{1}{x}+\tan ^{-1}(x) \]
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Rubi [A] time = 0.0048847, antiderivative size = 13, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 2, integrand size = 11, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.182, Rules used = {325, 203} \[ -\frac{1}{3 x^3}+\frac{1}{x}+\tan ^{-1}(x) \]
Antiderivative was successfully verified.
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Rule 325
Rule 203
Rubi steps
\begin{align*} \int \frac{1}{x^4 \left (1+x^2\right )} \, dx &=-\frac{1}{3 x^3}-\int \frac{1}{x^2 \left (1+x^2\right )} \, dx\\ &=-\frac{1}{3 x^3}+\frac{1}{x}+\int \frac{1}{1+x^2} \, dx\\ &=-\frac{1}{3 x^3}+\frac{1}{x}+\tan ^{-1}(x)\\ \end{align*}
Mathematica [A] time = 0.0038972, size = 13, normalized size = 1. \[ -\frac{1}{3 x^3}+\frac{1}{x}+\tan ^{-1}(x) \]
Antiderivative was successfully verified.
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Maple [A] time = 0.005, size = 12, normalized size = 0.9 \begin{align*} -{\frac{1}{3\,{x}^{3}}}+{x}^{-1}+\arctan \left ( x \right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.41326, size = 20, normalized size = 1.54 \begin{align*} \frac{3 \, x^{2} - 1}{3 \, x^{3}} + \arctan \left (x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.50589, size = 53, normalized size = 4.08 \begin{align*} \frac{3 \, x^{3} \arctan \left (x\right ) + 3 \, x^{2} - 1}{3 \, x^{3}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.105203, size = 14, normalized size = 1.08 \begin{align*} \operatorname{atan}{\left (x \right )} + \frac{3 x^{2} - 1}{3 x^{3}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.07896, size = 20, normalized size = 1.54 \begin{align*} \frac{3 \, x^{2} - 1}{3 \, x^{3}} + \arctan \left (x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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