Optimal. Leaf size=38 \[ \frac{x}{2}-\frac{1}{6 (\coth (x)+1)}-\frac{2 \tan ^{-1}\left (\frac{1-2 \coth (x)}{\sqrt{3}}\right )}{3 \sqrt{3}} \]
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Rubi [A] time = 0.0667445, antiderivative size = 38, normalized size of antiderivative = 1., number of steps used = 6, number of rules used = 5, integrand size = 8, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.625, Rules used = {3661, 2074, 207, 618, 204} \[ \frac{x}{2}-\frac{1}{6 (\coth (x)+1)}-\frac{2 \tan ^{-1}\left (\frac{1-2 \coth (x)}{\sqrt{3}}\right )}{3 \sqrt{3}} \]
Antiderivative was successfully verified.
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Rule 3661
Rule 2074
Rule 207
Rule 618
Rule 204
Rubi steps
\begin{align*} \int \frac{1}{1+\coth ^3(x)} \, dx &=\operatorname{Subst}\left (\int \frac{1}{\left (1-x^2\right ) \left (1+x^3\right )} \, dx,x,\coth (x)\right )\\ &=\operatorname{Subst}\left (\int \left (\frac{1}{6 (1+x)^2}-\frac{1}{2 \left (-1+x^2\right )}+\frac{1}{3 \left (1-x+x^2\right )}\right ) \, dx,x,\coth (x)\right )\\ &=-\frac{1}{6 (1+\coth (x))}+\frac{1}{3} \operatorname{Subst}\left (\int \frac{1}{1-x+x^2} \, dx,x,\coth (x)\right )-\frac{1}{2} \operatorname{Subst}\left (\int \frac{1}{-1+x^2} \, dx,x,\coth (x)\right )\\ &=\frac{x}{2}-\frac{1}{6 (1+\coth (x))}-\frac{2}{3} \operatorname{Subst}\left (\int \frac{1}{-3-x^2} \, dx,x,-1+2 \coth (x)\right )\\ &=\frac{x}{2}-\frac{2 \tan ^{-1}\left (\frac{1-2 \coth (x)}{\sqrt{3}}\right )}{3 \sqrt{3}}-\frac{1}{6 (1+\coth (x))}\\ \end{align*}
Mathematica [A] time = 0.0748426, size = 40, normalized size = 1.05 \[ \frac{1}{2} \tanh ^{-1}(\tanh (x))+\frac{1}{6 (\tanh (x)+1)}+\frac{2 \tan ^{-1}\left (\frac{1-2 \tanh (x)}{\sqrt{3}}\right )}{3 \sqrt{3}} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.026, size = 41, normalized size = 1.1 \begin{align*} -{\frac{1}{6+6\,{\rm coth} \left (x\right )}}+{\frac{\ln \left ( 1+{\rm coth} \left (x\right ) \right ) }{4}}-{\frac{\ln \left ({\rm coth} \left (x\right )-1 \right ) }{4}}+{\frac{2\,\sqrt{3}}{9}\arctan \left ({\frac{ \left ( 2\,{\rm coth} \left (x\right )-1 \right ) \sqrt{3}}{3}} \right ) } \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [B] time = 1.68541, size = 99, normalized size = 2.61 \begin{align*} -\frac{2}{9} \, \sqrt{3} \arctan \left (\frac{1}{6} \cdot 3^{\frac{3}{4}} \sqrt{2}{\left (2 \, \sqrt{3} e^{\left (-x\right )} + 3^{\frac{1}{4}} \sqrt{2}\right )}\right ) + \frac{2}{9} \, \sqrt{3} \arctan \left (\frac{1}{6} \cdot 3^{\frac{3}{4}} \sqrt{2}{\left (2 \, \sqrt{3} e^{\left (-x\right )} - 3^{\frac{1}{4}} \sqrt{2}\right )}\right ) + \frac{1}{2} \, x + \frac{1}{12} \, e^{\left (-2 \, x\right )} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] time = 2.31873, size = 340, normalized size = 8.95 \begin{align*} \frac{18 \, x \cosh \left (x\right )^{2} + 36 \, x \cosh \left (x\right ) \sinh \left (x\right ) + 18 \, x \sinh \left (x\right )^{2} + 8 \,{\left (\sqrt{3} \cosh \left (x\right )^{2} + 2 \, \sqrt{3} \cosh \left (x\right ) \sinh \left (x\right ) + \sqrt{3} \sinh \left (x\right )^{2}\right )} \arctan \left (-\frac{\sqrt{3} \cosh \left (x\right ) + \sqrt{3} \sinh \left (x\right )}{3 \,{\left (\cosh \left (x\right ) - \sinh \left (x\right )\right )}}\right ) + 3}{36 \,{\left (\cosh \left (x\right )^{2} + 2 \, \cosh \left (x\right ) \sinh \left (x\right ) + \sinh \left (x\right )^{2}\right )}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [B] time = 2.01386, size = 105, normalized size = 2.76 \begin{align*} \frac{9 x \tanh{\left (x \right )}}{18 \tanh{\left (x \right )} + 18} + \frac{9 x}{18 \tanh{\left (x \right )} + 18} - \frac{4 \sqrt{3} \tanh{\left (x \right )} \operatorname{atan}{\left (\frac{2 \sqrt{3} \tanh{\left (x \right )}}{3} - \frac{\sqrt{3}}{3} \right )}}{18 \tanh{\left (x \right )} + 18} - \frac{3 \tanh{\left (x \right )}}{18 \tanh{\left (x \right )} + 18} - \frac{4 \sqrt{3} \operatorname{atan}{\left (\frac{2 \sqrt{3} \tanh{\left (x \right )}}{3} - \frac{\sqrt{3}}{3} \right )}}{18 \tanh{\left (x \right )} + 18} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.16981, size = 34, normalized size = 0.89 \begin{align*} -\frac{2}{9} \, \sqrt{3} \arctan \left (\frac{1}{3} \, \sqrt{3} e^{\left (2 \, x\right )}\right ) + \frac{1}{2} \, x + \frac{1}{12} \, e^{\left (-2 \, x\right )} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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