Optimal. Leaf size=139 \[ -\frac{11 a^2 (1-a x)^{3/4} \sqrt [4]{a x+1}}{24 x}-\frac{3}{8} a^3 \tan ^{-1}\left (\frac{\sqrt [4]{a x+1}}{\sqrt [4]{1-a x}}\right )-\frac{3}{8} a^3 \tanh ^{-1}\left (\frac{\sqrt [4]{a x+1}}{\sqrt [4]{1-a x}}\right )-\frac{5 a (1-a x)^{3/4} \sqrt [4]{a x+1}}{12 x^2}-\frac{(1-a x)^{3/4} \sqrt [4]{a x+1}}{3 x^3} \]
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Rubi [A] time = 0.0620214, antiderivative size = 139, normalized size of antiderivative = 1., number of steps used = 9, number of rules used = 8, integrand size = 14, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.571, Rules used = {6126, 99, 151, 12, 93, 212, 206, 203} \[ -\frac{11 a^2 (1-a x)^{3/4} \sqrt [4]{a x+1}}{24 x}-\frac{3}{8} a^3 \tan ^{-1}\left (\frac{\sqrt [4]{a x+1}}{\sqrt [4]{1-a x}}\right )-\frac{3}{8} a^3 \tanh ^{-1}\left (\frac{\sqrt [4]{a x+1}}{\sqrt [4]{1-a x}}\right )-\frac{5 a (1-a x)^{3/4} \sqrt [4]{a x+1}}{12 x^2}-\frac{(1-a x)^{3/4} \sqrt [4]{a x+1}}{3 x^3} \]
Antiderivative was successfully verified.
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Rule 6126
Rule 99
Rule 151
Rule 12
Rule 93
Rule 212
Rule 206
Rule 203
Rubi steps
\begin{align*} \int \frac{e^{\frac{1}{2} \tanh ^{-1}(a x)}}{x^4} \, dx &=\int \frac{\sqrt [4]{1+a x}}{x^4 \sqrt [4]{1-a x}} \, dx\\ &=-\frac{(1-a x)^{3/4} \sqrt [4]{1+a x}}{3 x^3}+\frac{1}{3} \int \frac{\frac{5 a}{2}+2 a^2 x}{x^3 \sqrt [4]{1-a x} (1+a x)^{3/4}} \, dx\\ &=-\frac{(1-a x)^{3/4} \sqrt [4]{1+a x}}{3 x^3}-\frac{5 a (1-a x)^{3/4} \sqrt [4]{1+a x}}{12 x^2}-\frac{1}{6} \int \frac{-\frac{11 a^2}{4}-\frac{5 a^3 x}{2}}{x^2 \sqrt [4]{1-a x} (1+a x)^{3/4}} \, dx\\ &=-\frac{(1-a x)^{3/4} \sqrt [4]{1+a x}}{3 x^3}-\frac{5 a (1-a x)^{3/4} \sqrt [4]{1+a x}}{12 x^2}-\frac{11 a^2 (1-a x)^{3/4} \sqrt [4]{1+a x}}{24 x}+\frac{1}{6} \int \frac{9 a^3}{8 x \sqrt [4]{1-a x} (1+a x)^{3/4}} \, dx\\ &=-\frac{(1-a x)^{3/4} \sqrt [4]{1+a x}}{3 x^3}-\frac{5 a (1-a x)^{3/4} \sqrt [4]{1+a x}}{12 x^2}-\frac{11 a^2 (1-a x)^{3/4} \sqrt [4]{1+a x}}{24 x}+\frac{1}{16} \left (3 a^3\right ) \int \frac{1}{x \sqrt [4]{1-a x} (1+a x)^{3/4}} \, dx\\ &=-\frac{(1-a x)^{3/4} \sqrt [4]{1+a x}}{3 x^3}-\frac{5 a (1-a x)^{3/4} \sqrt [4]{1+a x}}{12 x^2}-\frac{11 a^2 (1-a x)^{3/4} \sqrt [4]{1+a x}}{24 x}+\frac{1}{4} \left (3 a^3\right ) \operatorname{Subst}\left (\int \frac{1}{-1+x^4} \, dx,x,\frac{\sqrt [4]{1+a x}}{\sqrt [4]{1-a x}}\right )\\ &=-\frac{(1-a x)^{3/4} \sqrt [4]{1+a x}}{3 x^3}-\frac{5 a (1-a x)^{3/4} \sqrt [4]{1+a x}}{12 x^2}-\frac{11 a^2 (1-a x)^{3/4} \sqrt [4]{1+a x}}{24 x}-\frac{1}{8} \left (3 a^3\right ) \operatorname{Subst}\left (\int \frac{1}{1-x^2} \, dx,x,\frac{\sqrt [4]{1+a x}}{\sqrt [4]{1-a x}}\right )-\frac{1}{8} \left (3 a^3\right ) \operatorname{Subst}\left (\int \frac{1}{1+x^2} \, dx,x,\frac{\sqrt [4]{1+a x}}{\sqrt [4]{1-a x}}\right )\\ &=-\frac{(1-a x)^{3/4} \sqrt [4]{1+a x}}{3 x^3}-\frac{5 a (1-a x)^{3/4} \sqrt [4]{1+a x}}{12 x^2}-\frac{11 a^2 (1-a x)^{3/4} \sqrt [4]{1+a x}}{24 x}-\frac{3}{8} a^3 \tan ^{-1}\left (\frac{\sqrt [4]{1+a x}}{\sqrt [4]{1-a x}}\right )-\frac{3}{8} a^3 \tanh ^{-1}\left (\frac{\sqrt [4]{1+a x}}{\sqrt [4]{1-a x}}\right )\\ \end{align*}
Mathematica [C] time = 0.0216139, size = 78, normalized size = 0.56 \[ -\frac{(1-a x)^{3/4} \left (6 a^3 x^3 \text{Hypergeometric2F1}\left (\frac{3}{4},1,\frac{7}{4},\frac{1-a x}{a x+1}\right )+11 a^3 x^3+21 a^2 x^2+18 a x+8\right )}{24 x^3 (a x+1)^{3/4}} \]
Warning: Unable to verify antiderivative.
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Maple [F] time = 0.09, size = 0, normalized size = 0. \begin{align*} \int{\frac{1}{{x}^{4}}\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{\sqrt{\frac{a x + 1}{\sqrt{-a^{2} x^{2} + 1}}}}{x^{4}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.7291, size = 347, normalized size = 2.5 \begin{align*} -\frac{18 \, a^{3} x^{3} \arctan \left (\sqrt{-\frac{\sqrt{-a^{2} x^{2} + 1}}{a x - 1}}\right ) + 9 \, a^{3} x^{3} \log \left (\sqrt{-\frac{\sqrt{-a^{2} x^{2} + 1}}{a x - 1}} + 1\right ) - 9 \, a^{3} x^{3} \log \left (\sqrt{-\frac{\sqrt{-a^{2} x^{2} + 1}}{a x - 1}} - 1\right ) - 2 \,{\left (11 \, a^{3} x^{3} - a^{2} x^{2} - 2 \, a x - 8\right )} \sqrt{-\frac{\sqrt{-a^{2} x^{2} + 1}}{a x - 1}}}{48 \, x^{3}} \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{\sqrt{\frac{a x + 1}{\sqrt{- a^{2} x^{2} + 1}}}}{x^{4}}\, 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{\sqrt{\frac{a x + 1}{\sqrt{-a^{2} x^{2} + 1}}}}{x^{4}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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