Optimal. Leaf size=2 \[ \tan ^{-1}(x) \]
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Rubi [A] time = 0.001515, antiderivative size = 2, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 2, integrand size = 18, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.111, Rules used = {28, 203} \[ \tan ^{-1}(x) \]
Antiderivative was successfully verified.
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Rule 28
Rule 203
Rubi steps
\begin{align*} \int \frac{1+x^2}{1+2 x^2+x^4} \, dx &=\int \frac{1}{1+x^2} \, dx\\ &=\tan ^{-1}(x)\\ \end{align*}
Mathematica [A] time = 0.0025709, size = 2, normalized size = 1. \[ \tan ^{-1}(x) \]
Antiderivative was successfully verified.
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Maple [A] time = 0.044, size = 3, normalized size = 1.5 \begin{align*} \arctan \left ( x \right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.43537, size = 3, normalized size = 1.5 \begin{align*} \arctan \left (x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.33545, size = 15, normalized size = 7.5 \begin{align*} \arctan \left (x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.083135, size = 2, normalized size = 1. \begin{align*} \operatorname{atan}{\left (x \right )} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.10475, size = 3, normalized size = 1.5 \begin{align*} \arctan \left (x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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