Integrand size = 31, antiderivative size = 49 \[ \int \frac {2-x+2 x^2-x^3+x^4}{(-1+x) \left (2+x^2\right )^2} \, dx=\frac {1}{2 \left (2+x^2\right )}-\frac {\arctan \left (\frac {x}{\sqrt {2}}\right )}{3 \sqrt {2}}+\frac {1}{3} \log (1-x)+\frac {1}{3} \log \left (2+x^2\right ) \]
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Time = 0.05 (sec) , antiderivative size = 49, normalized size of antiderivative = 1.00, number of steps used = 6, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.161, Rules used = {1661, 1643, 649, 209, 266} \[ \int \frac {2-x+2 x^2-x^3+x^4}{(-1+x) \left (2+x^2\right )^2} \, dx=-\frac {\arctan \left (\frac {x}{\sqrt {2}}\right )}{3 \sqrt {2}}+\frac {1}{2 \left (x^2+2\right )}+\frac {1}{3} \log \left (x^2+2\right )+\frac {1}{3} \log (1-x) \]
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Rule 209
Rule 266
Rule 649
Rule 1643
Rule 1661
Rubi steps \begin{align*} \text {integral}& = \frac {1}{2 \left (2+x^2\right )}-\frac {1}{4} \int \frac {-4+4 x-4 x^2}{(-1+x) \left (2+x^2\right )} \, dx \\ & = \frac {1}{2 \left (2+x^2\right )}-\frac {1}{4} \int \left (-\frac {4}{3 (-1+x)}-\frac {4 (-1+2 x)}{3 \left (2+x^2\right )}\right ) \, dx \\ & = \frac {1}{2 \left (2+x^2\right )}+\frac {1}{3} \log (1-x)+\frac {1}{3} \int \frac {-1+2 x}{2+x^2} \, dx \\ & = \frac {1}{2 \left (2+x^2\right )}+\frac {1}{3} \log (1-x)-\frac {1}{3} \int \frac {1}{2+x^2} \, dx+\frac {2}{3} \int \frac {x}{2+x^2} \, dx \\ & = \frac {1}{2 \left (2+x^2\right )}-\frac {\arctan \left (\frac {x}{\sqrt {2}}\right )}{3 \sqrt {2}}+\frac {1}{3} \log (1-x)+\frac {1}{3} \log \left (2+x^2\right ) \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 61, normalized size of antiderivative = 1.24 \[ \int \frac {2-x+2 x^2-x^3+x^4}{(-1+x) \left (2+x^2\right )^2} \, dx=\frac {1}{2 \left (3+2 (-1+x)+(-1+x)^2\right )}-\frac {\arctan \left (\frac {x}{\sqrt {2}}\right )}{3 \sqrt {2}}+\frac {1}{3} \log \left (3+2 (-1+x)+(-1+x)^2\right )+\frac {1}{3} \log (-1+x) \]
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Time = 0.07 (sec) , antiderivative size = 37, normalized size of antiderivative = 0.76
method | result | size |
default | \(\frac {\ln \left (-1+x \right )}{3}+\frac {1}{2 x^{2}+4}+\frac {\ln \left (x^{2}+2\right )}{3}-\frac {\arctan \left (\frac {x \sqrt {2}}{2}\right ) \sqrt {2}}{6}\) | \(37\) |
risch | \(\frac {\ln \left (-1+x \right )}{3}+\frac {1}{2 x^{2}+4}+\frac {\ln \left (x^{2}+2\right )}{3}-\frac {\arctan \left (\frac {x \sqrt {2}}{2}\right ) \sqrt {2}}{6}\) | \(37\) |
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Time = 0.25 (sec) , antiderivative size = 51, normalized size of antiderivative = 1.04 \[ \int \frac {2-x+2 x^2-x^3+x^4}{(-1+x) \left (2+x^2\right )^2} \, dx=-\frac {\sqrt {2} {\left (x^{2} + 2\right )} \arctan \left (\frac {1}{2} \, \sqrt {2} x\right ) - 2 \, {\left (x^{2} + 2\right )} \log \left (x^{2} + 2\right ) - 2 \, {\left (x^{2} + 2\right )} \log \left (x - 1\right ) - 3}{6 \, {\left (x^{2} + 2\right )}} \]
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Time = 0.08 (sec) , antiderivative size = 14, normalized size of antiderivative = 0.29 \[ \int \frac {2-x+2 x^2-x^3+x^4}{(-1+x) \left (2+x^2\right )^2} \, dx=\frac {\log {\left (x - 1 \right )}}{3} + \frac {1}{2 x^{2} + 4} \]
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Time = 0.27 (sec) , antiderivative size = 36, normalized size of antiderivative = 0.73 \[ \int \frac {2-x+2 x^2-x^3+x^4}{(-1+x) \left (2+x^2\right )^2} \, dx=-\frac {1}{6} \, \sqrt {2} \arctan \left (\frac {1}{2} \, \sqrt {2} x\right ) + \frac {1}{2 \, {\left (x^{2} + 2\right )}} + \frac {1}{3} \, \log \left (x^{2} + 2\right ) + \frac {1}{3} \, \log \left (x - 1\right ) \]
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Time = 0.29 (sec) , antiderivative size = 37, normalized size of antiderivative = 0.76 \[ \int \frac {2-x+2 x^2-x^3+x^4}{(-1+x) \left (2+x^2\right )^2} \, dx=-\frac {1}{6} \, \sqrt {2} \arctan \left (\frac {1}{2} \, \sqrt {2} x\right ) + \frac {1}{2 \, {\left (x^{2} + 2\right )}} + \frac {1}{3} \, \log \left (x^{2} + 2\right ) + \frac {1}{3} \, \log \left ({\left | x - 1 \right |}\right ) \]
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Time = 0.12 (sec) , antiderivative size = 53, normalized size of antiderivative = 1.08 \[ \int \frac {2-x+2 x^2-x^3+x^4}{(-1+x) \left (2+x^2\right )^2} \, dx=\frac {\ln \left (x-1\right )}{3}+\ln \left (x-\sqrt {2}\,1{}\mathrm {i}\right )\,\left (\frac {1}{3}+\frac {\sqrt {2}\,1{}\mathrm {i}}{12}\right )-\ln \left (x+\sqrt {2}\,1{}\mathrm {i}\right )\,\left (-\frac {1}{3}+\frac {\sqrt {2}\,1{}\mathrm {i}}{12}\right )+\frac {1}{2\,\left (x^2+2\right )} \]
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