Optimal. Leaf size=11 \[ \frac{x}{1-x^2} \]
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Rubi [A] time = 0.0032829, antiderivative size = 11, 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, 383} \[ \frac{x}{1-x^2} \]
Antiderivative was successfully verified.
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Rule 28
Rule 383
Rubi steps
\begin{align*} \int \frac{1+x^2}{1-2 x^2+x^4} \, dx &=\int \frac{1+x^2}{\left (-1+x^2\right )^2} \, dx\\ &=\frac{x}{1-x^2}\\ \end{align*}
Mathematica [A] time = 0.0038171, size = 10, normalized size = 0.91 \[ -\frac{x}{x^2-1} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.043, size = 16, normalized size = 1.5 \begin{align*} -{\frac{1}{-2+2\,x}}-{\frac{1}{2+2\,x}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.0077, size = 14, normalized size = 1.27 \begin{align*} -\frac{x}{x^{2} - 1} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.27508, size = 19, normalized size = 1.73 \begin{align*} -\frac{x}{x^{2} - 1} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.078523, size = 7, normalized size = 0.64 \begin{align*} - \frac{x}{x^{2} - 1} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.14241, size = 15, normalized size = 1.36 \begin{align*} -\frac{1}{x - \frac{1}{x}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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