Optimal. Leaf size=71 \[ \frac{\text{PolyLog}\left (3,-e^{a+b x}\right )}{2 b^2}-\frac{\text{PolyLog}\left (3,e^{a+b x}\right )}{2 b^2}-\frac{x \text{PolyLog}\left (2,-e^{a+b x}\right )}{2 b}+\frac{x \text{PolyLog}\left (2,e^{a+b x}\right )}{2 b} \]
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Rubi [A] time = 0.057715, antiderivative size = 71, normalized size of antiderivative = 1., number of steps used = 7, number of rules used = 4, integrand size = 10, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.4, Rules used = {6213, 2531, 2282, 6589} \[ \frac{\text{PolyLog}\left (3,-e^{a+b x}\right )}{2 b^2}-\frac{\text{PolyLog}\left (3,e^{a+b x}\right )}{2 b^2}-\frac{x \text{PolyLog}\left (2,-e^{a+b x}\right )}{2 b}+\frac{x \text{PolyLog}\left (2,e^{a+b x}\right )}{2 b} \]
Antiderivative was successfully verified.
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Rule 6213
Rule 2531
Rule 2282
Rule 6589
Rubi steps
\begin{align*} \int x \tanh ^{-1}\left (e^{a+b x}\right ) \, dx &=-\left (\frac{1}{2} \int x \log \left (1-e^{a+b x}\right ) \, dx\right )+\frac{1}{2} \int x \log \left (1+e^{a+b x}\right ) \, dx\\ &=-\frac{x \text{Li}_2\left (-e^{a+b x}\right )}{2 b}+\frac{x \text{Li}_2\left (e^{a+b x}\right )}{2 b}+\frac{\int \text{Li}_2\left (-e^{a+b x}\right ) \, dx}{2 b}-\frac{\int \text{Li}_2\left (e^{a+b x}\right ) \, dx}{2 b}\\ &=-\frac{x \text{Li}_2\left (-e^{a+b x}\right )}{2 b}+\frac{x \text{Li}_2\left (e^{a+b x}\right )}{2 b}+\frac{\operatorname{Subst}\left (\int \frac{\text{Li}_2(-x)}{x} \, dx,x,e^{a+b x}\right )}{2 b^2}-\frac{\operatorname{Subst}\left (\int \frac{\text{Li}_2(x)}{x} \, dx,x,e^{a+b x}\right )}{2 b^2}\\ &=-\frac{x \text{Li}_2\left (-e^{a+b x}\right )}{2 b}+\frac{x \text{Li}_2\left (e^{a+b x}\right )}{2 b}+\frac{\text{Li}_3\left (-e^{a+b x}\right )}{2 b^2}-\frac{\text{Li}_3\left (e^{a+b x}\right )}{2 b^2}\\ \end{align*}
Mathematica [A] time = 0.0517436, size = 113, normalized size = 1.59 \[ \frac{-2 b x \text{PolyLog}\left (2,-e^{a+b x}\right )+2 b x \text{PolyLog}\left (2,e^{a+b x}\right )+2 \text{PolyLog}\left (3,-e^{a+b x}\right )-2 \text{PolyLog}\left (3,e^{a+b x}\right )+b^2 x^2 \log \left (1-e^{a+b x}\right )-b^2 x^2 \log \left (e^{a+b x}+1\right )+2 b^2 x^2 \tanh ^{-1}\left (e^{a+b x}\right )}{4 b^2} \]
Antiderivative was successfully verified.
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Maple [B] time = 0.042, size = 153, normalized size = 2.2 \begin{align*}{\frac{{x}^{2}{\it Artanh} \left ({{\rm e}^{bx+a}} \right ) }{2}}-{\frac{\ln \left ({{\rm e}^{bx+a}}+1 \right ){x}^{2}}{4}}+{\frac{\ln \left ({{\rm e}^{bx+a}}+1 \right ){a}^{2}}{4\,{b}^{2}}}-{\frac{x{\it polylog} \left ( 2,-{{\rm e}^{bx+a}} \right ) }{2\,b}}+{\frac{{\it polylog} \left ( 3,-{{\rm e}^{bx+a}} \right ) }{2\,{b}^{2}}}+{\frac{\ln \left ( 1-{{\rm e}^{bx+a}} \right ){x}^{2}}{4}}-{\frac{\ln \left ( 1-{{\rm e}^{bx+a}} \right ){a}^{2}}{4\,{b}^{2}}}+{\frac{x{\it polylog} \left ( 2,{{\rm e}^{bx+a}} \right ) }{2\,b}}-{\frac{{\it polylog} \left ( 3,{{\rm e}^{bx+a}} \right ) }{2\,{b}^{2}}}-{\frac{{a}^{2}{\it Artanh} \left ({{\rm e}^{bx+a}} \right ) }{2\,{b}^{2}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.00834, size = 146, normalized size = 2.06 \begin{align*} \frac{1}{2} \, x^{2} \operatorname{artanh}\left (e^{\left (b x + a\right )}\right ) - \frac{1}{4} \, b{\left (\frac{b^{2} x^{2} \log \left (e^{\left (b x + a\right )} + 1\right ) + 2 \, b x{\rm Li}_2\left (-e^{\left (b x + a\right )}\right ) - 2 \,{\rm Li}_{3}(-e^{\left (b x + a\right )})}{b^{3}} - \frac{b^{2} x^{2} \log \left (-e^{\left (b x + a\right )} + 1\right ) + 2 \, b x{\rm Li}_2\left (e^{\left (b x + a\right )}\right ) - 2 \,{\rm Li}_{3}(e^{\left (b x + a\right )})}{b^{3}}\right )} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [C] time = 1.6175, size = 585, normalized size = 8.24 \begin{align*} \frac{b^{2} x^{2} \log \left (-\frac{\cosh \left (b x + a\right ) + \sinh \left (b x + a\right ) + 1}{\cosh \left (b x + a\right ) + \sinh \left (b x + a\right ) - 1}\right ) - b^{2} x^{2} \log \left (\cosh \left (b x + a\right ) + \sinh \left (b x + a\right ) + 1\right ) + 2 \, b x{\rm Li}_2\left (\cosh \left (b x + a\right ) + \sinh \left (b x + a\right )\right ) - 2 \, b x{\rm Li}_2\left (-\cosh \left (b x + a\right ) - \sinh \left (b x + a\right )\right ) + a^{2} \log \left (\cosh \left (b x + a\right ) + \sinh \left (b x + a\right ) - 1\right ) +{\left (b^{2} x^{2} - a^{2}\right )} \log \left (-\cosh \left (b x + a\right ) - \sinh \left (b x + a\right ) + 1\right ) - 2 \,{\rm polylog}\left (3, \cosh \left (b x + a\right ) + \sinh \left (b x + a\right )\right ) + 2 \,{\rm polylog}\left (3, -\cosh \left (b x + a\right ) - \sinh \left (b x + a\right )\right )}{4 \, b^{2}} \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 x \operatorname{atanh}{\left (e^{a} e^{b x} \right )}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int x \operatorname{artanh}\left (e^{\left (b x + a\right )}\right )\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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