Integrand size = 26, antiderivative size = 28 \[ \int \frac {4+8 x+5 x^2+2 x^3}{\left (2+2 x+x^2\right )^2} \, dx=-\frac {1}{2+2 x+x^2}-\arctan (1+x)+\log \left (2+2 x+x^2\right ) \]
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Time = 0.02 (sec) , antiderivative size = 28, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.192, Rules used = {1674, 648, 631, 210, 642} \[ \int \frac {4+8 x+5 x^2+2 x^3}{\left (2+2 x+x^2\right )^2} \, dx=-\arctan (x+1)-\frac {1}{x^2+2 x+2}+\log \left (x^2+2 x+2\right ) \]
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Rule 210
Rule 631
Rule 642
Rule 648
Rule 1674
Rubi steps \begin{align*} \text {integral}& = -\frac {1}{2+2 x+x^2}+\frac {1}{4} \int \frac {4+8 x}{2+2 x+x^2} \, dx \\ & = -\frac {1}{2+2 x+x^2}-\int \frac {1}{2+2 x+x^2} \, dx+\int \frac {2+2 x}{2+2 x+x^2} \, dx \\ & = -\frac {1}{2+2 x+x^2}+\log \left (2+2 x+x^2\right )+\text {Subst}\left (\int \frac {1}{-1-x^2} \, dx,x,1+x\right ) \\ & = -\frac {1}{2+2 x+x^2}-\tan ^{-1}(1+x)+\log \left (2+2 x+x^2\right ) \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 28, normalized size of antiderivative = 1.00 \[ \int \frac {4+8 x+5 x^2+2 x^3}{\left (2+2 x+x^2\right )^2} \, dx=-\frac {1}{2+2 x+x^2}-\arctan (1+x)+\log \left (2+2 x+x^2\right ) \]
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Time = 0.95 (sec) , antiderivative size = 29, normalized size of antiderivative = 1.04
method | result | size |
default | \(-\frac {1}{x^{2}+2 x +2}-\arctan \left (x +1\right )+\ln \left (x^{2}+2 x +2\right )\) | \(29\) |
risch | \(-\frac {1}{x^{2}+2 x +2}-\arctan \left (x +1\right )+\ln \left (x^{2}+2 x +2\right )\) | \(29\) |
parallelrisch | \(\frac {2 i \ln \left (x +1-i\right )-i \ln \left (x +1+i\right ) x^{2}-2 i \ln \left (x +1+i\right )+2 \ln \left (x +1-i\right ) x^{2}+2 i \ln \left (x +1-i\right ) x +2 \ln \left (x +1+i\right ) x^{2}-2+i \ln \left (x +1-i\right ) x^{2}+4 \ln \left (x +1-i\right ) x -2 i \ln \left (x +1+i\right ) x +4 \ln \left (x +1+i\right ) x +4 \ln \left (x +1-i\right )+4 \ln \left (x +1+i\right )}{2 x^{2}+4 x +4}\) | \(133\) |
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Time = 0.26 (sec) , antiderivative size = 46, normalized size of antiderivative = 1.64 \[ \int \frac {4+8 x+5 x^2+2 x^3}{\left (2+2 x+x^2\right )^2} \, dx=-\frac {{\left (x^{2} + 2 \, x + 2\right )} \arctan \left (x + 1\right ) - {\left (x^{2} + 2 \, x + 2\right )} \log \left (x^{2} + 2 \, x + 2\right ) + 1}{x^{2} + 2 \, x + 2} \]
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Time = 0.06 (sec) , antiderivative size = 24, normalized size of antiderivative = 0.86 \[ \int \frac {4+8 x+5 x^2+2 x^3}{\left (2+2 x+x^2\right )^2} \, dx=\log {\left (x^{2} + 2 x + 2 \right )} - \operatorname {atan}{\left (x + 1 \right )} - \frac {1}{x^{2} + 2 x + 2} \]
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Time = 0.35 (sec) , antiderivative size = 28, normalized size of antiderivative = 1.00 \[ \int \frac {4+8 x+5 x^2+2 x^3}{\left (2+2 x+x^2\right )^2} \, dx=-\frac {1}{x^{2} + 2 \, x + 2} - \arctan \left (x + 1\right ) + \log \left (x^{2} + 2 \, x + 2\right ) \]
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Time = 0.27 (sec) , antiderivative size = 28, normalized size of antiderivative = 1.00 \[ \int \frac {4+8 x+5 x^2+2 x^3}{\left (2+2 x+x^2\right )^2} \, dx=-\frac {1}{x^{2} + 2 \, x + 2} - \arctan \left (x + 1\right ) + \log \left (x^{2} + 2 \, x + 2\right ) \]
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Time = 9.43 (sec) , antiderivative size = 28, normalized size of antiderivative = 1.00 \[ \int \frac {4+8 x+5 x^2+2 x^3}{\left (2+2 x+x^2\right )^2} \, dx=\ln \left (x^2+2\,x+2\right )-\mathrm {atan}\left (x+1\right )-\frac {1}{x^2+2\,x+2} \]
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