Integrand size = 11, antiderivative size = 19 \[ \int \frac {\tanh ^2(x)}{1+\tanh (x)} \, dx=-\frac {x}{2}+\log (\cosh (x))-\frac {1}{2 (1+\tanh (x))} \]
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Time = 0.03 (sec) , antiderivative size = 19, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.182, Rules used = {3621, 3556} \[ \int \frac {\tanh ^2(x)}{1+\tanh (x)} \, dx=-\frac {x}{2}-\frac {1}{2 (\tanh (x)+1)}+\log (\cosh (x)) \]
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Rule 3556
Rule 3621
Rubi steps \begin{align*} \text {integral}& = -\frac {1}{2 (1+\tanh (x))}-\frac {1}{2} \int (1-2 \tanh (x)) \, dx \\ & = -\frac {x}{2}-\frac {1}{2 (1+\tanh (x))}+\int \tanh (x) \, dx \\ & = -\frac {x}{2}+\log (\cosh (x))-\frac {1}{2 (1+\tanh (x))} \\ \end{align*}
Time = 0.07 (sec) , antiderivative size = 34, normalized size of antiderivative = 1.79 \[ \int \frac {\tanh ^2(x)}{1+\tanh (x)} \, dx=\frac {2 \log (\cosh (x))+\tanh (x)+2 \log (\cosh (x)) \tanh (x)-\text {arctanh}(\tanh (x)) (1+\tanh (x))}{2 (1+\tanh (x))} \]
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Time = 0.04 (sec) , antiderivative size = 18, normalized size of antiderivative = 0.95
method | result | size |
risch | \(-\frac {3 x}{2}-\frac {{\mathrm e}^{-2 x}}{4}+\ln \left (1+{\mathrm e}^{2 x}\right )\) | \(18\) |
derivativedivides | \(-\frac {1}{2 \left (1+\tanh \left (x \right )\right )}-\frac {3 \ln \left (1+\tanh \left (x \right )\right )}{4}-\frac {\ln \left (\tanh \left (x \right )-1\right )}{4}\) | \(24\) |
default | \(-\frac {1}{2 \left (1+\tanh \left (x \right )\right )}-\frac {3 \ln \left (1+\tanh \left (x \right )\right )}{4}-\frac {\ln \left (\tanh \left (x \right )-1\right )}{4}\) | \(24\) |
parallelrisch | \(-\frac {1+2 \ln \left (1-\tanh \left (x \right )\right ) \tanh \left (x \right )+3 \tanh \left (x \right ) x +2 \ln \left (1-\tanh \left (x \right )\right )+3 x}{2 \left (1+\tanh \left (x \right )\right )}\) | \(39\) |
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Leaf count of result is larger than twice the leaf count of optimal. 73 vs. \(2 (15) = 30\).
Time = 0.25 (sec) , antiderivative size = 73, normalized size of antiderivative = 3.84 \[ \int \frac {\tanh ^2(x)}{1+\tanh (x)} \, dx=-\frac {6 \, x \cosh \left (x\right )^{2} + 12 \, x \cosh \left (x\right ) \sinh \left (x\right ) + 6 \, x \sinh \left (x\right )^{2} - 4 \, {\left (\cosh \left (x\right )^{2} + 2 \, \cosh \left (x\right ) \sinh \left (x\right ) + \sinh \left (x\right )^{2}\right )} \log \left (\frac {2 \, \cosh \left (x\right )}{\cosh \left (x\right ) - \sinh \left (x\right )}\right ) + 1}{4 \, {\left (\cosh \left (x\right )^{2} + 2 \, \cosh \left (x\right ) \sinh \left (x\right ) + \sinh \left (x\right )^{2}\right )}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 61 vs. \(2 (15) = 30\).
Time = 0.17 (sec) , antiderivative size = 61, normalized size of antiderivative = 3.21 \[ \int \frac {\tanh ^2(x)}{1+\tanh (x)} \, dx=\frac {x \tanh {\left (x \right )}}{2 \tanh {\left (x \right )} + 2} + \frac {x}{2 \tanh {\left (x \right )} + 2} - \frac {2 \log {\left (\tanh {\left (x \right )} + 1 \right )} \tanh {\left (x \right )}}{2 \tanh {\left (x \right )} + 2} - \frac {2 \log {\left (\tanh {\left (x \right )} + 1 \right )}}{2 \tanh {\left (x \right )} + 2} - \frac {1}{2 \tanh {\left (x \right )} + 2} \]
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none
Time = 0.28 (sec) , antiderivative size = 17, normalized size of antiderivative = 0.89 \[ \int \frac {\tanh ^2(x)}{1+\tanh (x)} \, dx=\frac {1}{2} \, x - \frac {1}{4} \, e^{\left (-2 \, x\right )} + \log \left (e^{\left (-2 \, x\right )} + 1\right ) \]
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Time = 0.26 (sec) , antiderivative size = 17, normalized size of antiderivative = 0.89 \[ \int \frac {\tanh ^2(x)}{1+\tanh (x)} \, dx=-\frac {3}{2} \, x - \frac {1}{4} \, e^{\left (-2 \, x\right )} + \log \left (e^{\left (2 \, x\right )} + 1\right ) \]
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Time = 0.07 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.11 \[ \int \frac {\tanh ^2(x)}{1+\tanh (x)} \, dx=\frac {x}{2}-\ln \left (\mathrm {tanh}\left (x\right )+1\right )-\frac {1}{2\,\left (\mathrm {tanh}\left (x\right )+1\right )} \]
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