Optimal. Leaf size=46 \[ -\frac{x^2}{2}-\frac{1}{2} \log \left (x^2+x+1\right )-\log (1-x)-\frac{\tan ^{-1}\left (\frac{2 x+1}{\sqrt{3}}\right )}{\sqrt{3}} \]
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Rubi [A] time = 0.0838093, antiderivative size = 46, normalized size of antiderivative = 1., number of steps used = 9, number of rules used = 8, integrand size = 19, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.421, Rules used = {1593, 1887, 1875, 31, 634, 618, 204, 628} \[ -\frac{x^2}{2}-\frac{1}{2} \log \left (x^2+x+1\right )-\log (1-x)-\frac{\tan ^{-1}\left (\frac{2 x+1}{\sqrt{3}}\right )}{\sqrt{3}} \]
Antiderivative was successfully verified.
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Rule 1593
Rule 1887
Rule 1875
Rule 31
Rule 634
Rule 618
Rule 204
Rule 628
Rubi steps
\begin{align*} \int \frac{2 x^2+x^4}{1-x^3} \, dx &=\int \frac{x^2 \left (2+x^2\right )}{1-x^3} \, dx\\ &=\int \left (-x+\frac{x (1+2 x)}{1-x^3}\right ) \, dx\\ &=-\frac{x^2}{2}+\int \frac{x (1+2 x)}{1-x^3} \, dx\\ &=-\frac{x^2}{2}+\frac{1}{3} \int \frac{-3-3 x}{1+x+x^2} \, dx+\int \frac{1}{1-x} \, dx\\ &=-\frac{x^2}{2}-\log (1-x)-\frac{1}{2} \int \frac{1}{1+x+x^2} \, dx-\frac{1}{2} \int \frac{1+2 x}{1+x+x^2} \, dx\\ &=-\frac{x^2}{2}-\log (1-x)-\frac{1}{2} \log \left (1+x+x^2\right )+\operatorname{Subst}\left (\int \frac{1}{-3-x^2} \, dx,x,1+2 x\right )\\ &=-\frac{x^2}{2}-\frac{\tan ^{-1}\left (\frac{1+2 x}{\sqrt{3}}\right )}{\sqrt{3}}-\log (1-x)-\frac{1}{2} \log \left (1+x+x^2\right )\\ \end{align*}
Mathematica [A] time = 0.0121212, size = 54, normalized size = 1.17 \[ \frac{1}{6} \left (-3 x^2+\log \left (x^2+x+1\right )-4 \log \left (1-x^3\right )-2 \log (1-x)-2 \sqrt{3} \tan ^{-1}\left (\frac{2 x+1}{\sqrt{3}}\right )\right ) \]
Antiderivative was successfully verified.
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Maple [A] time = 0.005, size = 38, normalized size = 0.8 \begin{align*} -{\frac{{x}^{2}}{2}}-\ln \left ( -1+x \right ) -{\frac{\ln \left ({x}^{2}+x+1 \right ) }{2}}-{\frac{\sqrt{3}}{3}\arctan \left ({\frac{ \left ( 1+2\,x \right ) \sqrt{3}}{3}} \right ) } \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.41591, size = 50, normalized size = 1.09 \begin{align*} -\frac{1}{2} \, x^{2} - \frac{1}{3} \, \sqrt{3} \arctan \left (\frac{1}{3} \, \sqrt{3}{\left (2 \, x + 1\right )}\right ) - \frac{1}{2} \, \log \left (x^{2} + x + 1\right ) - \log \left (x - 1\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.51551, size = 122, normalized size = 2.65 \begin{align*} -\frac{1}{2} \, x^{2} - \frac{1}{3} \, \sqrt{3} \arctan \left (\frac{1}{3} \, \sqrt{3}{\left (2 \, x + 1\right )}\right ) - \frac{1}{2} \, \log \left (x^{2} + x + 1\right ) - \log \left (x - 1\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.120693, size = 46, normalized size = 1. \begin{align*} - \frac{x^{2}}{2} - \log{\left (x - 1 \right )} - \frac{\log{\left (x^{2} + x + 1 \right )}}{2} - \frac{\sqrt{3} \operatorname{atan}{\left (\frac{2 \sqrt{3} x}{3} + \frac{\sqrt{3}}{3} \right )}}{3} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.0801, size = 51, normalized size = 1.11 \begin{align*} -\frac{1}{2} \, x^{2} - \frac{1}{3} \, \sqrt{3} \arctan \left (\frac{1}{3} \, \sqrt{3}{\left (2 \, x + 1\right )}\right ) - \frac{1}{2} \, \log \left (x^{2} + x + 1\right ) - \log \left ({\left | x - 1 \right |}\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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