Optimal. Leaf size=23 \[ \tan ^{-1}(x+1)-\frac{x (x+2)}{2 \left (x^2+2 x+2\right )} \]
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Rubi [A] time = 0.0072044, antiderivative size = 23, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 3, integrand size = 14, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.214, Rules used = {722, 617, 204} \[ \tan ^{-1}(x+1)-\frac{x (x+2)}{2 \left (x^2+2 x+2\right )} \]
Antiderivative was successfully verified.
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Rule 722
Rule 617
Rule 204
Rubi steps
\begin{align*} \int \frac{x^2}{\left (2+2 x+x^2\right )^2} \, dx &=-\frac{x (2+x)}{2 \left (2+2 x+x^2\right )}+\int \frac{1}{2+2 x+x^2} \, dx\\ &=-\frac{x (2+x)}{2 \left (2+2 x+x^2\right )}-\operatorname{Subst}\left (\int \frac{1}{-1-x^2} \, dx,x,1+x\right )\\ &=-\frac{x (2+x)}{2 \left (2+2 x+x^2\right )}+\tan ^{-1}(1+x)\\ \end{align*}
Mathematica [A] time = 0.0073388, size = 15, normalized size = 0.65 \[ \frac{1}{x^2+2 x+2}+\tan ^{-1}(x+1) \]
Antiderivative was successfully verified.
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Maple [A] time = 0.005, size = 16, normalized size = 0.7 \begin{align*} \left ({x}^{2}+2\,x+2 \right ) ^{-1}+\arctan \left ( 1+x \right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.41192, size = 20, normalized size = 0.87 \begin{align*} \frac{1}{x^{2} + 2 \, x + 2} + \arctan \left (x + 1\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.0115, size = 72, normalized size = 3.13 \begin{align*} \frac{{\left (x^{2} + 2 \, x + 2\right )} \arctan \left (x + 1\right ) + 1}{x^{2} + 2 \, x + 2} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.104021, size = 14, normalized size = 0.61 \begin{align*} \operatorname{atan}{\left (x + 1 \right )} + \frac{1}{x^{2} + 2 x + 2} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.0862, size = 20, normalized size = 0.87 \begin{align*} \frac{1}{x^{2} + 2 \, x + 2} + \arctan \left (x + 1\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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