Integrand size = 20, antiderivative size = 9 \[ \int \frac {-x+x^3}{(-1+x)^2 \left (1+x^2\right )} \, dx=\arctan (x)+\log (1-x) \]
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Time = 0.05 (sec) , antiderivative size = 9, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.200, Rules used = {1600, 1607, 1643, 209} \[ \int \frac {-x+x^3}{(-1+x)^2 \left (1+x^2\right )} \, dx=\arctan (x)+\log (1-x) \]
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Rule 209
Rule 1600
Rule 1607
Rule 1643
Rubi steps \begin{align*} \text {integral}& = \int \frac {x+x^2}{(-1+x) \left (1+x^2\right )} \, dx \\ & = \int \frac {x (1+x)}{(-1+x) \left (1+x^2\right )} \, dx \\ & = \int \left (\frac {1}{-1+x}+\frac {1}{1+x^2}\right ) \, dx \\ & = \log (1-x)+\int \frac {1}{1+x^2} \, dx \\ & = \tan ^{-1}(x)+\log (1-x) \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 9, normalized size of antiderivative = 1.00 \[ \int \frac {-x+x^3}{(-1+x)^2 \left (1+x^2\right )} \, dx=\arctan (x)+\log (1-x) \]
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Time = 0.80 (sec) , antiderivative size = 8, normalized size of antiderivative = 0.89
method | result | size |
default | \(\arctan \left (x \right )+\ln \left (x -1\right )\) | \(8\) |
risch | \(\arctan \left (x \right )+\ln \left (x -1\right )\) | \(8\) |
parallelrisch | \(\frac {i \ln \left (x +i\right )}{2}-\frac {i \ln \left (x -i\right )}{2}+\ln \left (x -1\right )\) | \(22\) |
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none
Time = 0.30 (sec) , antiderivative size = 7, normalized size of antiderivative = 0.78 \[ \int \frac {-x+x^3}{(-1+x)^2 \left (1+x^2\right )} \, dx=\arctan \left (x\right ) + \log \left (x - 1\right ) \]
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Time = 0.07 (sec) , antiderivative size = 7, normalized size of antiderivative = 0.78 \[ \int \frac {-x+x^3}{(-1+x)^2 \left (1+x^2\right )} \, dx=\log {\left (x - 1 \right )} + \operatorname {atan}{\left (x \right )} \]
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none
Time = 0.27 (sec) , antiderivative size = 7, normalized size of antiderivative = 0.78 \[ \int \frac {-x+x^3}{(-1+x)^2 \left (1+x^2\right )} \, dx=\arctan \left (x\right ) + \log \left (x - 1\right ) \]
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Leaf count of result is larger than twice the leaf count of optimal. 28 vs. \(2 (9) = 18\).
Time = 0.30 (sec) , antiderivative size = 28, normalized size of antiderivative = 3.11 \[ \int \frac {-x+x^3}{(-1+x)^2 \left (1+x^2\right )} \, dx=\frac {1}{4} \, \pi - \pi \left \lfloor \frac {\pi + 4 \, \arctan \left (x\right )}{4 \, \pi } + \frac {1}{2} \right \rfloor + \arctan \left (x\right ) + \log \left ({\left | x - 1 \right |}\right ) \]
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Time = 9.26 (sec) , antiderivative size = 19, normalized size of antiderivative = 2.11 \[ \int \frac {-x+x^3}{(-1+x)^2 \left (1+x^2\right )} \, dx=\ln \left (x-1\right )-\mathrm {atan}\left (\frac {5}{4\,x+2}-\frac {1}{2}\right ) \]
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