Optimal. Leaf size=255 \[ -\frac{(a x+1)^{3/4} (1-a x)^{5/4}}{2 a^2}-\frac{(a x+1)^{3/4} \sqrt [4]{1-a x}}{4 a^2}-\frac{\log \left (\frac{\sqrt{1-a x}}{\sqrt{a x+1}}-\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{a x+1}}+1\right )}{8 \sqrt{2} a^2}+\frac{\log \left (\frac{\sqrt{1-a x}}{\sqrt{a x+1}}+\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{a x+1}}+1\right )}{8 \sqrt{2} a^2}-\frac{\tan ^{-1}\left (1-\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{a x+1}}\right )}{4 \sqrt{2} a^2}+\frac{\tan ^{-1}\left (\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{a x+1}}+1\right )}{4 \sqrt{2} a^2} \]
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Rubi [A] time = 0.168347, antiderivative size = 255, normalized size of antiderivative = 1., number of steps used = 14, number of rules used = 11, integrand size = 12, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.917, Rules used = {6126, 80, 50, 63, 240, 211, 1165, 628, 1162, 617, 204} \[ -\frac{(a x+1)^{3/4} (1-a x)^{5/4}}{2 a^2}-\frac{(a x+1)^{3/4} \sqrt [4]{1-a x}}{4 a^2}-\frac{\log \left (\frac{\sqrt{1-a x}}{\sqrt{a x+1}}-\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{a x+1}}+1\right )}{8 \sqrt{2} a^2}+\frac{\log \left (\frac{\sqrt{1-a x}}{\sqrt{a x+1}}+\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{a x+1}}+1\right )}{8 \sqrt{2} a^2}-\frac{\tan ^{-1}\left (1-\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{a x+1}}\right )}{4 \sqrt{2} a^2}+\frac{\tan ^{-1}\left (\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{a x+1}}+1\right )}{4 \sqrt{2} a^2} \]
Antiderivative was successfully verified.
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Rule 6126
Rule 80
Rule 50
Rule 63
Rule 240
Rule 211
Rule 1165
Rule 628
Rule 1162
Rule 617
Rule 204
Rubi steps
\begin{align*} \int e^{-\frac{1}{2} \tanh ^{-1}(a x)} x \, dx &=\int \frac{x \sqrt [4]{1-a x}}{\sqrt [4]{1+a x}} \, dx\\ &=-\frac{(1-a x)^{5/4} (1+a x)^{3/4}}{2 a^2}-\frac{\int \frac{\sqrt [4]{1-a x}}{\sqrt [4]{1+a x}} \, dx}{4 a}\\ &=-\frac{\sqrt [4]{1-a x} (1+a x)^{3/4}}{4 a^2}-\frac{(1-a x)^{5/4} (1+a x)^{3/4}}{2 a^2}-\frac{\int \frac{1}{(1-a x)^{3/4} \sqrt [4]{1+a x}} \, dx}{8 a}\\ &=-\frac{\sqrt [4]{1-a x} (1+a x)^{3/4}}{4 a^2}-\frac{(1-a x)^{5/4} (1+a x)^{3/4}}{2 a^2}+\frac{\operatorname{Subst}\left (\int \frac{1}{\sqrt [4]{2-x^4}} \, dx,x,\sqrt [4]{1-a x}\right )}{2 a^2}\\ &=-\frac{\sqrt [4]{1-a x} (1+a x)^{3/4}}{4 a^2}-\frac{(1-a x)^{5/4} (1+a x)^{3/4}}{2 a^2}+\frac{\operatorname{Subst}\left (\int \frac{1}{1+x^4} \, dx,x,\frac{\sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{2 a^2}\\ &=-\frac{\sqrt [4]{1-a x} (1+a x)^{3/4}}{4 a^2}-\frac{(1-a x)^{5/4} (1+a x)^{3/4}}{2 a^2}+\frac{\operatorname{Subst}\left (\int \frac{1-x^2}{1+x^4} \, dx,x,\frac{\sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{4 a^2}+\frac{\operatorname{Subst}\left (\int \frac{1+x^2}{1+x^4} \, dx,x,\frac{\sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{4 a^2}\\ &=-\frac{\sqrt [4]{1-a x} (1+a x)^{3/4}}{4 a^2}-\frac{(1-a x)^{5/4} (1+a x)^{3/4}}{2 a^2}+\frac{\operatorname{Subst}\left (\int \frac{1}{1-\sqrt{2} x+x^2} \, dx,x,\frac{\sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{8 a^2}+\frac{\operatorname{Subst}\left (\int \frac{1}{1+\sqrt{2} x+x^2} \, dx,x,\frac{\sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{8 a^2}-\frac{\operatorname{Subst}\left (\int \frac{\sqrt{2}+2 x}{-1-\sqrt{2} x-x^2} \, dx,x,\frac{\sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{8 \sqrt{2} a^2}-\frac{\operatorname{Subst}\left (\int \frac{\sqrt{2}-2 x}{-1+\sqrt{2} x-x^2} \, dx,x,\frac{\sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{8 \sqrt{2} a^2}\\ &=-\frac{\sqrt [4]{1-a x} (1+a x)^{3/4}}{4 a^2}-\frac{(1-a x)^{5/4} (1+a x)^{3/4}}{2 a^2}-\frac{\log \left (1+\frac{\sqrt{1-a x}}{\sqrt{1+a x}}-\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{8 \sqrt{2} a^2}+\frac{\log \left (1+\frac{\sqrt{1-a x}}{\sqrt{1+a x}}+\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{8 \sqrt{2} a^2}+\frac{\operatorname{Subst}\left (\int \frac{1}{-1-x^2} \, dx,x,1-\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{4 \sqrt{2} a^2}-\frac{\operatorname{Subst}\left (\int \frac{1}{-1-x^2} \, dx,x,1+\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{4 \sqrt{2} a^2}\\ &=-\frac{\sqrt [4]{1-a x} (1+a x)^{3/4}}{4 a^2}-\frac{(1-a x)^{5/4} (1+a x)^{3/4}}{2 a^2}-\frac{\tan ^{-1}\left (1-\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{4 \sqrt{2} a^2}+\frac{\tan ^{-1}\left (1+\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{4 \sqrt{2} a^2}-\frac{\log \left (1+\frac{\sqrt{1-a x}}{\sqrt{1+a x}}-\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{8 \sqrt{2} a^2}+\frac{\log \left (1+\frac{\sqrt{1-a x}}{\sqrt{1+a x}}+\frac{\sqrt{2} \sqrt [4]{1-a x}}{\sqrt [4]{1+a x}}\right )}{8 \sqrt{2} a^2}\\ \end{align*}
Mathematica [C] time = 0.018661, size = 55, normalized size = 0.22 \[ \frac{(1-a x)^{5/4} \left (2^{3/4} \text{Hypergeometric2F1}\left (\frac{1}{4},\frac{5}{4},\frac{9}{4},\frac{1}{2} (1-a x)\right )-5 (a x+1)^{3/4}\right )}{10 a^2} \]
Warning: Unable to verify antiderivative.
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Maple [F] time = 0.099, size = 0, normalized size = 0. \begin{align*} \int{x{\frac{1}{\sqrt{{(ax+1){\frac{1}{\sqrt{-{a}^{2}{x}^{2}+1}}}}}}}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{x}{\sqrt{\frac{a x + 1}{\sqrt{-a^{2} x^{2} + 1}}}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] time = 2.17513, size = 1314, normalized size = 5.15 \begin{align*} \frac{4 \, \sqrt{2} a^{2} \frac{1}{a^{8}}^{\frac{1}{4}} \arctan \left (\sqrt{2} a^{2} \sqrt{\frac{\sqrt{2}{\left (a^{7} x - a^{6}\right )} \sqrt{-\frac{\sqrt{-a^{2} x^{2} + 1}}{a x - 1}} \frac{1}{a^{8}}^{\frac{3}{4}} +{\left (a^{5} x - a^{4}\right )} \sqrt{\frac{1}{a^{8}}} - \sqrt{-a^{2} x^{2} + 1}}{a x - 1}} \frac{1}{a^{8}}^{\frac{1}{4}} - \sqrt{2} a^{2} \sqrt{-\frac{\sqrt{-a^{2} x^{2} + 1}}{a x - 1}} \frac{1}{a^{8}}^{\frac{1}{4}} - 1\right ) + 4 \, \sqrt{2} a^{2} \frac{1}{a^{8}}^{\frac{1}{4}} \arctan \left (\sqrt{2} a^{2} \sqrt{-\frac{\sqrt{2}{\left (a^{7} x - a^{6}\right )} \sqrt{-\frac{\sqrt{-a^{2} x^{2} + 1}}{a x - 1}} \frac{1}{a^{8}}^{\frac{3}{4}} -{\left (a^{5} x - a^{4}\right )} \sqrt{\frac{1}{a^{8}}} + \sqrt{-a^{2} x^{2} + 1}}{a x - 1}} \frac{1}{a^{8}}^{\frac{1}{4}} - \sqrt{2} a^{2} \sqrt{-\frac{\sqrt{-a^{2} x^{2} + 1}}{a x - 1}} \frac{1}{a^{8}}^{\frac{1}{4}} + 1\right ) + \sqrt{2} a^{2} \frac{1}{a^{8}}^{\frac{1}{4}} \log \left (\frac{\sqrt{2}{\left (a^{7} x - a^{6}\right )} \sqrt{-\frac{\sqrt{-a^{2} x^{2} + 1}}{a x - 1}} \frac{1}{a^{8}}^{\frac{3}{4}} +{\left (a^{5} x - a^{4}\right )} \sqrt{\frac{1}{a^{8}}} - \sqrt{-a^{2} x^{2} + 1}}{a x - 1}\right ) - \sqrt{2} a^{2} \frac{1}{a^{8}}^{\frac{1}{4}} \log \left (-\frac{\sqrt{2}{\left (a^{7} x - a^{6}\right )} \sqrt{-\frac{\sqrt{-a^{2} x^{2} + 1}}{a x - 1}} \frac{1}{a^{8}}^{\frac{3}{4}} -{\left (a^{5} x - a^{4}\right )} \sqrt{\frac{1}{a^{8}}} + \sqrt{-a^{2} x^{2} + 1}}{a x - 1}\right ) + 4 \, \sqrt{-a^{2} x^{2} + 1}{\left (2 \, a x - 3\right )} \sqrt{-\frac{\sqrt{-a^{2} x^{2} + 1}}{a x - 1}}}{16 \, a^{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 \frac{x}{\sqrt{\frac{a x + 1}{\sqrt{- a^{2} x^{2} + 1}}}}\, 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 \frac{x}{\sqrt{\frac{a x + 1}{\sqrt{-a^{2} x^{2} + 1}}}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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