Optimal. Leaf size=61 \[ \frac{2 \sqrt{a-b} \sqrt{a+b} \tanh ^{-1}\left (\frac{\sqrt{a-b} \tanh \left (\frac{x}{2}\right )}{\sqrt{a+b}}\right )}{a^2}+\frac{b \tan ^{-1}(\sinh (x))}{a^2}-\frac{\tanh (x)}{a} \]
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Rubi [A] time = 0.231897, antiderivative size = 61, normalized size of antiderivative = 1., number of steps used = 6, number of rules used = 6, integrand size = 13, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.462, Rules used = {2723, 3056, 3001, 3770, 2659, 208} \[ \frac{2 \sqrt{a-b} \sqrt{a+b} \tanh ^{-1}\left (\frac{\sqrt{a-b} \tanh \left (\frac{x}{2}\right )}{\sqrt{a+b}}\right )}{a^2}+\frac{b \tan ^{-1}(\sinh (x))}{a^2}-\frac{\tanh (x)}{a} \]
Antiderivative was successfully verified.
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Rule 2723
Rule 3056
Rule 3001
Rule 3770
Rule 2659
Rule 208
Rubi steps
\begin{align*} \int \frac{\tanh ^2(x)}{a+b \cosh (x)} \, dx &=-\int \frac{\left (1-\cosh ^2(x)\right ) \text{sech}^2(x)}{a+b \cosh (x)} \, dx\\ &=-\frac{\tanh (x)}{a}-\frac{\int \frac{(-b-a \cosh (x)) \text{sech}(x)}{a+b \cosh (x)} \, dx}{a}\\ &=-\frac{\tanh (x)}{a}+\frac{b \int \text{sech}(x) \, dx}{a^2}-\frac{\left (-a^2+b^2\right ) \int \frac{1}{a+b \cosh (x)} \, dx}{a^2}\\ &=\frac{b \tan ^{-1}(\sinh (x))}{a^2}-\frac{\tanh (x)}{a}-\frac{\left (2 \left (-a^2+b^2\right )\right ) \operatorname{Subst}\left (\int \frac{1}{a+b-(a-b) x^2} \, dx,x,\tanh \left (\frac{x}{2}\right )\right )}{a^2}\\ &=\frac{b \tan ^{-1}(\sinh (x))}{a^2}+\frac{2 \sqrt{a-b} \sqrt{a+b} \tanh ^{-1}\left (\frac{\sqrt{a-b} \tanh \left (\frac{x}{2}\right )}{\sqrt{a+b}}\right )}{a^2}-\frac{\tanh (x)}{a}\\ \end{align*}
Mathematica [A] time = 0.104588, size = 61, normalized size = 1. \[ \frac{2 \sqrt{b^2-a^2} \tan ^{-1}\left (\frac{(a-b) \tanh \left (\frac{x}{2}\right )}{\sqrt{b^2-a^2}}\right )-a \tanh (x)+2 b \tan ^{-1}\left (\tanh \left (\frac{x}{2}\right )\right )}{a^2} \]
Antiderivative was successfully verified.
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Maple [B] time = 0.022, size = 108, normalized size = 1.8 \begin{align*} 2\,{\frac{1}{\sqrt{ \left ( a+b \right ) \left ( a-b \right ) }}{\it Artanh} \left ({\frac{ \left ( a-b \right ) \tanh \left ( x/2 \right ) }{\sqrt{ \left ( a+b \right ) \left ( a-b \right ) }}} \right ) }-2\,{\frac{{b}^{2}}{{a}^{2}\sqrt{ \left ( a+b \right ) \left ( a-b \right ) }}{\it Artanh} \left ({\frac{ \left ( a-b \right ) \tanh \left ( x/2 \right ) }{\sqrt{ \left ( a+b \right ) \left ( a-b \right ) }}} \right ) }-2\,{\frac{\tanh \left ( x/2 \right ) }{a \left ( \left ( \tanh \left ( x/2 \right ) \right ) ^{2}+1 \right ) }}+2\,{\frac{b\arctan \left ( \tanh \left ( x/2 \right ) \right ) }{{a}^{2}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: ValueError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] time = 2.17282, size = 984, normalized size = 16.13 \begin{align*} \left [\frac{\sqrt{a^{2} - b^{2}}{\left (\cosh \left (x\right )^{2} + 2 \, \cosh \left (x\right ) \sinh \left (x\right ) + \sinh \left (x\right )^{2} + 1\right )} \log \left (\frac{b^{2} \cosh \left (x\right )^{2} + b^{2} \sinh \left (x\right )^{2} + 2 \, a b \cosh \left (x\right ) + 2 \, a^{2} - b^{2} + 2 \,{\left (b^{2} \cosh \left (x\right ) + a b\right )} \sinh \left (x\right ) - 2 \, \sqrt{a^{2} - b^{2}}{\left (b \cosh \left (x\right ) + b \sinh \left (x\right ) + a\right )}}{b \cosh \left (x\right )^{2} + b \sinh \left (x\right )^{2} + 2 \, a \cosh \left (x\right ) + 2 \,{\left (b \cosh \left (x\right ) + a\right )} \sinh \left (x\right ) + b}\right ) + 2 \,{\left (b \cosh \left (x\right )^{2} + 2 \, b \cosh \left (x\right ) \sinh \left (x\right ) + b \sinh \left (x\right )^{2} + b\right )} \arctan \left (\cosh \left (x\right ) + \sinh \left (x\right )\right ) + 2 \, a}{a^{2} \cosh \left (x\right )^{2} + 2 \, a^{2} \cosh \left (x\right ) \sinh \left (x\right ) + a^{2} \sinh \left (x\right )^{2} + a^{2}}, -\frac{2 \,{\left (\sqrt{-a^{2} + b^{2}}{\left (\cosh \left (x\right )^{2} + 2 \, \cosh \left (x\right ) \sinh \left (x\right ) + \sinh \left (x\right )^{2} + 1\right )} \arctan \left (-\frac{\sqrt{-a^{2} + b^{2}}{\left (b \cosh \left (x\right ) + b \sinh \left (x\right ) + a\right )}}{a^{2} - b^{2}}\right ) -{\left (b \cosh \left (x\right )^{2} + 2 \, b \cosh \left (x\right ) \sinh \left (x\right ) + b \sinh \left (x\right )^{2} + b\right )} \arctan \left (\cosh \left (x\right ) + \sinh \left (x\right )\right ) - a\right )}}{a^{2} \cosh \left (x\right )^{2} + 2 \, a^{2} \cosh \left (x\right ) \sinh \left (x\right ) + a^{2} \sinh \left (x\right )^{2} + a^{2}}\right ] \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{\tanh ^{2}{\left (x \right )}}{a + b \cosh{\left (x \right )}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.14741, size = 90, normalized size = 1.48 \begin{align*} \frac{2 \, b \arctan \left (e^{x}\right )}{a^{2}} + \frac{2 \,{\left (a^{2} - b^{2}\right )} \arctan \left (\frac{b e^{x} + a}{\sqrt{-a^{2} + b^{2}}}\right )}{\sqrt{-a^{2} + b^{2}} a^{2}} + \frac{2}{a{\left (e^{\left (2 \, x\right )} + 1\right )}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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