Optimal. Leaf size=24 \[ -\frac{1}{2 \left (x^2+1\right )}+\frac{1}{2} \log \left (x^2+1\right )+\tan ^{-1}(x) \]
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Rubi [A] time = 0.0159376, antiderivative size = 24, normalized size of antiderivative = 1., number of steps used = 5, number of rules used = 5, integrand size = 24, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.208, Rules used = {28, 1814, 635, 203, 260} \[ -\frac{1}{2 \left (x^2+1\right )}+\frac{1}{2} \log \left (x^2+1\right )+\tan ^{-1}(x) \]
Antiderivative was successfully verified.
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Rule 28
Rule 1814
Rule 635
Rule 203
Rule 260
Rubi steps
\begin{align*} \int \frac{1+2 x+x^2+x^3}{1+2 x^2+x^4} \, dx &=\int \frac{1+2 x+x^2+x^3}{\left (1+x^2\right )^2} \, dx\\ &=-\frac{1}{2 \left (1+x^2\right )}-\frac{1}{2} \int \frac{-2-2 x}{1+x^2} \, dx\\ &=-\frac{1}{2 \left (1+x^2\right )}+\int \frac{1}{1+x^2} \, dx+\int \frac{x}{1+x^2} \, dx\\ &=-\frac{1}{2 \left (1+x^2\right )}+\tan ^{-1}(x)+\frac{1}{2} \log \left (1+x^2\right )\\ \end{align*}
Mathematica [A] time = 0.0097642, size = 24, normalized size = 1. \[ -\frac{1}{2 \left (x^2+1\right )}+\frac{1}{2} \log \left (x^2+1\right )+\tan ^{-1}(x) \]
Antiderivative was successfully verified.
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Maple [A] time = 0.005, size = 21, normalized size = 0.9 \begin{align*} -{\frac{1}{2\,{x}^{2}+2}}+\arctan \left ( x \right ) +{\frac{\ln \left ({x}^{2}+1 \right ) }{2}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.5107, size = 27, normalized size = 1.12 \begin{align*} -\frac{1}{2 \,{\left (x^{2} + 1\right )}} + \arctan \left (x\right ) + \frac{1}{2} \, \log \left (x^{2} + 1\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.59358, size = 92, normalized size = 3.83 \begin{align*} \frac{2 \,{\left (x^{2} + 1\right )} \arctan \left (x\right ) +{\left (x^{2} + 1\right )} \log \left (x^{2} + 1\right ) - 1}{2 \,{\left (x^{2} + 1\right )}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.111997, size = 19, normalized size = 0.79 \begin{align*} \frac{\log{\left (x^{2} + 1 \right )}}{2} + \operatorname{atan}{\left (x \right )} - \frac{1}{2 x^{2} + 2} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.13662, size = 27, normalized size = 1.12 \begin{align*} -\frac{1}{2 \,{\left (x^{2} + 1\right )}} + \arctan \left (x\right ) + \frac{1}{2} \, \log \left (x^{2} + 1\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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