Optimal. Leaf size=70 \[ \frac{x^2 \sqrt{a^2 x^2+1} \sinh ^{-1}(a x)}{3 a^2}-\frac{2 \sqrt{a^2 x^2+1} \sinh ^{-1}(a x)}{3 a^4}+\frac{2 x}{3 a^3}-\frac{x^3}{9 a} \]
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Rubi [A] time = 0.102941, antiderivative size = 70, normalized size of antiderivative = 1., number of steps used = 4, number of rules used = 4, integrand size = 21, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.19, Rules used = {5758, 5717, 8, 30} \[ \frac{x^2 \sqrt{a^2 x^2+1} \sinh ^{-1}(a x)}{3 a^2}-\frac{2 \sqrt{a^2 x^2+1} \sinh ^{-1}(a x)}{3 a^4}+\frac{2 x}{3 a^3}-\frac{x^3}{9 a} \]
Antiderivative was successfully verified.
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Rule 5758
Rule 5717
Rule 8
Rule 30
Rubi steps
\begin{align*} \int \frac{x^3 \sinh ^{-1}(a x)}{\sqrt{1+a^2 x^2}} \, dx &=\frac{x^2 \sqrt{1+a^2 x^2} \sinh ^{-1}(a x)}{3 a^2}-\frac{2 \int \frac{x \sinh ^{-1}(a x)}{\sqrt{1+a^2 x^2}} \, dx}{3 a^2}-\frac{\int x^2 \, dx}{3 a}\\ &=-\frac{x^3}{9 a}-\frac{2 \sqrt{1+a^2 x^2} \sinh ^{-1}(a x)}{3 a^4}+\frac{x^2 \sqrt{1+a^2 x^2} \sinh ^{-1}(a x)}{3 a^2}+\frac{2 \int 1 \, dx}{3 a^3}\\ &=\frac{2 x}{3 a^3}-\frac{x^3}{9 a}-\frac{2 \sqrt{1+a^2 x^2} \sinh ^{-1}(a x)}{3 a^4}+\frac{x^2 \sqrt{1+a^2 x^2} \sinh ^{-1}(a x)}{3 a^2}\\ \end{align*}
Mathematica [A] time = 0.0408277, size = 48, normalized size = 0.69 \[ \frac{-a^3 x^3+3 \left (a^2 x^2-2\right ) \sqrt{a^2 x^2+1} \sinh ^{-1}(a x)+6 a x}{9 a^4} \]
Antiderivative was successfully verified.
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Maple [A] time = 0., size = 82, normalized size = 1.2 \begin{align*}{\frac{1}{9\,{a}^{4}} \left ( 3\,{a}^{4}{x}^{4}{\it Arcsinh} \left ( ax \right ) -3\,{a}^{2}{x}^{2}{\it Arcsinh} \left ( ax \right ) -{a}^{3}{x}^{3}\sqrt{{a}^{2}{x}^{2}+1}-6\,{\it Arcsinh} \left ( ax \right ) +6\,ax\sqrt{{a}^{2}{x}^{2}+1} \right ){\frac{1}{\sqrt{{a}^{2}{x}^{2}+1}}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.24391, size = 80, normalized size = 1.14 \begin{align*} -\frac{1}{9} \, a{\left (\frac{x^{3}}{a^{2}} - \frac{6 \, x}{a^{4}}\right )} + \frac{1}{3} \,{\left (\frac{\sqrt{a^{2} x^{2} + 1} x^{2}}{a^{2}} - \frac{2 \, \sqrt{a^{2} x^{2} + 1}}{a^{4}}\right )} \operatorname{arsinh}\left (a x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 2.57303, size = 126, normalized size = 1.8 \begin{align*} -\frac{a^{3} x^{3} - 3 \, \sqrt{a^{2} x^{2} + 1}{\left (a^{2} x^{2} - 2\right )} \log \left (a x + \sqrt{a^{2} x^{2} + 1}\right ) - 6 \, a x}{9 \, a^{4}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 1.66434, size = 65, normalized size = 0.93 \begin{align*} \begin{cases} - \frac{x^{3}}{9 a} + \frac{x^{2} \sqrt{a^{2} x^{2} + 1} \operatorname{asinh}{\left (a x \right )}}{3 a^{2}} + \frac{2 x}{3 a^{3}} - \frac{2 \sqrt{a^{2} x^{2} + 1} \operatorname{asinh}{\left (a x \right )}}{3 a^{4}} & \text{for}\: a \neq 0 \\0 & \text{otherwise} \end{cases} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.35864, size = 85, normalized size = 1.21 \begin{align*} -\frac{a^{2} x^{3} - 6 \, x}{9 \, a^{3}} + \frac{{\left ({\left (a^{2} x^{2} + 1\right )}^{\frac{3}{2}} - 3 \, \sqrt{a^{2} x^{2} + 1}\right )} \log \left (a x + \sqrt{a^{2} x^{2} + 1}\right )}{3 \, a^{4}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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