Optimal. Leaf size=136 \[ \frac{2 \left (1-a^2 x^2\right )^{3/2}}{27 a^3}-\frac{14 \sqrt{1-a^2 x^2}}{9 a^3}+\frac{x^2 \sqrt{1-a^2 x^2} \sin ^{-1}(a x)^2}{3 a}+\frac{2 \sqrt{1-a^2 x^2} \sin ^{-1}(a x)^2}{3 a^3}-\frac{4 x \sin ^{-1}(a x)}{3 a^2}+\frac{1}{3} x^3 \sin ^{-1}(a x)^3-\frac{2}{9} x^3 \sin ^{-1}(a x) \]
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Rubi [A] time = 0.224747, antiderivative size = 136, normalized size of antiderivative = 1., number of steps used = 9, number of rules used = 7, integrand size = 10, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.7, Rules used = {4627, 4707, 4677, 4619, 261, 266, 43} \[ \frac{2 \left (1-a^2 x^2\right )^{3/2}}{27 a^3}-\frac{14 \sqrt{1-a^2 x^2}}{9 a^3}+\frac{x^2 \sqrt{1-a^2 x^2} \sin ^{-1}(a x)^2}{3 a}+\frac{2 \sqrt{1-a^2 x^2} \sin ^{-1}(a x)^2}{3 a^3}-\frac{4 x \sin ^{-1}(a x)}{3 a^2}+\frac{1}{3} x^3 \sin ^{-1}(a x)^3-\frac{2}{9} x^3 \sin ^{-1}(a x) \]
Antiderivative was successfully verified.
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Rule 4627
Rule 4707
Rule 4677
Rule 4619
Rule 261
Rule 266
Rule 43
Rubi steps
\begin{align*} \int x^2 \sin ^{-1}(a x)^3 \, dx &=\frac{1}{3} x^3 \sin ^{-1}(a x)^3-a \int \frac{x^3 \sin ^{-1}(a x)^2}{\sqrt{1-a^2 x^2}} \, dx\\ &=\frac{x^2 \sqrt{1-a^2 x^2} \sin ^{-1}(a x)^2}{3 a}+\frac{1}{3} x^3 \sin ^{-1}(a x)^3-\frac{2}{3} \int x^2 \sin ^{-1}(a x) \, dx-\frac{2 \int \frac{x \sin ^{-1}(a x)^2}{\sqrt{1-a^2 x^2}} \, dx}{3 a}\\ &=-\frac{2}{9} x^3 \sin ^{-1}(a x)+\frac{2 \sqrt{1-a^2 x^2} \sin ^{-1}(a x)^2}{3 a^3}+\frac{x^2 \sqrt{1-a^2 x^2} \sin ^{-1}(a x)^2}{3 a}+\frac{1}{3} x^3 \sin ^{-1}(a x)^3-\frac{4 \int \sin ^{-1}(a x) \, dx}{3 a^2}+\frac{1}{9} (2 a) \int \frac{x^3}{\sqrt{1-a^2 x^2}} \, dx\\ &=-\frac{4 x \sin ^{-1}(a x)}{3 a^2}-\frac{2}{9} x^3 \sin ^{-1}(a x)+\frac{2 \sqrt{1-a^2 x^2} \sin ^{-1}(a x)^2}{3 a^3}+\frac{x^2 \sqrt{1-a^2 x^2} \sin ^{-1}(a x)^2}{3 a}+\frac{1}{3} x^3 \sin ^{-1}(a x)^3+\frac{4 \int \frac{x}{\sqrt{1-a^2 x^2}} \, dx}{3 a}+\frac{1}{9} a \operatorname{Subst}\left (\int \frac{x}{\sqrt{1-a^2 x}} \, dx,x,x^2\right )\\ &=-\frac{4 \sqrt{1-a^2 x^2}}{3 a^3}-\frac{4 x \sin ^{-1}(a x)}{3 a^2}-\frac{2}{9} x^3 \sin ^{-1}(a x)+\frac{2 \sqrt{1-a^2 x^2} \sin ^{-1}(a x)^2}{3 a^3}+\frac{x^2 \sqrt{1-a^2 x^2} \sin ^{-1}(a x)^2}{3 a}+\frac{1}{3} x^3 \sin ^{-1}(a x)^3+\frac{1}{9} a \operatorname{Subst}\left (\int \left (\frac{1}{a^2 \sqrt{1-a^2 x}}-\frac{\sqrt{1-a^2 x}}{a^2}\right ) \, dx,x,x^2\right )\\ &=-\frac{14 \sqrt{1-a^2 x^2}}{9 a^3}+\frac{2 \left (1-a^2 x^2\right )^{3/2}}{27 a^3}-\frac{4 x \sin ^{-1}(a x)}{3 a^2}-\frac{2}{9} x^3 \sin ^{-1}(a x)+\frac{2 \sqrt{1-a^2 x^2} \sin ^{-1}(a x)^2}{3 a^3}+\frac{x^2 \sqrt{1-a^2 x^2} \sin ^{-1}(a x)^2}{3 a}+\frac{1}{3} x^3 \sin ^{-1}(a x)^3\\ \end{align*}
Mathematica [A] time = 0.0446312, size = 95, normalized size = 0.7 \[ \frac{-2 \sqrt{1-a^2 x^2} \left (a^2 x^2+20\right )+9 a^3 x^3 \sin ^{-1}(a x)^3+9 \sqrt{1-a^2 x^2} \left (a^2 x^2+2\right ) \sin ^{-1}(a x)^2-6 a x \left (a^2 x^2+6\right ) \sin ^{-1}(a x)}{27 a^3} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.045, size = 106, normalized size = 0.8 \begin{align*}{\frac{1}{{a}^{3}} \left ({\frac{{a}^{3}{x}^{3} \left ( \arcsin \left ( ax \right ) \right ) ^{3}}{3}}+{\frac{ \left ( \arcsin \left ( ax \right ) \right ) ^{2} \left ({a}^{2}{x}^{2}+2 \right ) }{3}\sqrt{-{a}^{2}{x}^{2}+1}}-{\frac{4}{3}\sqrt{-{a}^{2}{x}^{2}+1}}-{\frac{4\,ax\arcsin \left ( ax \right ) }{3}}-{\frac{2\,{a}^{3}{x}^{3}\arcsin \left ( ax \right ) }{9}}-{\frac{2\,{a}^{2}{x}^{2}+4}{27}\sqrt{-{a}^{2}{x}^{2}+1}} \right ) } \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.72559, size = 162, normalized size = 1.19 \begin{align*} \frac{1}{3} \, x^{3} \arcsin \left (a x\right )^{3} + \frac{1}{3} \, a{\left (\frac{\sqrt{-a^{2} x^{2} + 1} x^{2}}{a^{2}} + \frac{2 \, \sqrt{-a^{2} x^{2} + 1}}{a^{4}}\right )} \arcsin \left (a x\right )^{2} - \frac{2}{27} \, a{\left (\frac{\sqrt{-a^{2} x^{2} + 1} x^{2} + \frac{20 \, \sqrt{-a^{2} x^{2} + 1}}{a^{2}}}{a^{2}} + \frac{3 \,{\left (a^{2} x^{3} + 6 \, x\right )} \arcsin \left (a x\right )}{a^{3}}\right )} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 2.16897, size = 189, normalized size = 1.39 \begin{align*} \frac{9 \, a^{3} x^{3} \arcsin \left (a x\right )^{3} - 6 \,{\left (a^{3} x^{3} + 6 \, a x\right )} \arcsin \left (a x\right ) -{\left (2 \, a^{2} x^{2} - 9 \,{\left (a^{2} x^{2} + 2\right )} \arcsin \left (a x\right )^{2} + 40\right )} \sqrt{-a^{2} x^{2} + 1}}{27 \, a^{3}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 5.89492, size = 128, normalized size = 0.94 \begin{align*} \begin{cases} \frac{x^{3} \operatorname{asin}^{3}{\left (a x \right )}}{3} - \frac{2 x^{3} \operatorname{asin}{\left (a x \right )}}{9} + \frac{x^{2} \sqrt{- a^{2} x^{2} + 1} \operatorname{asin}^{2}{\left (a x \right )}}{3 a} - \frac{2 x^{2} \sqrt{- a^{2} x^{2} + 1}}{27 a} - \frac{4 x \operatorname{asin}{\left (a x \right )}}{3 a^{2}} + \frac{2 \sqrt{- a^{2} x^{2} + 1} \operatorname{asin}^{2}{\left (a x \right )}}{3 a^{3}} - \frac{40 \sqrt{- a^{2} x^{2} + 1}}{27 a^{3}} & \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 = 1.29957, size = 192, normalized size = 1.41 \begin{align*} \frac{{\left (a^{2} x^{2} - 1\right )} x \arcsin \left (a x\right )^{3}}{3 \, a^{2}} + \frac{x \arcsin \left (a x\right )^{3}}{3 \, a^{2}} - \frac{2 \,{\left (a^{2} x^{2} - 1\right )} x \arcsin \left (a x\right )}{9 \, a^{2}} - \frac{{\left (-a^{2} x^{2} + 1\right )}^{\frac{3}{2}} \arcsin \left (a x\right )^{2}}{3 \, a^{3}} - \frac{14 \, x \arcsin \left (a x\right )}{9 \, a^{2}} + \frac{\sqrt{-a^{2} x^{2} + 1} \arcsin \left (a x\right )^{2}}{a^{3}} + \frac{2 \,{\left (-a^{2} x^{2} + 1\right )}^{\frac{3}{2}}}{27 \, a^{3}} - \frac{14 \, \sqrt{-a^{2} x^{2} + 1}}{9 \, a^{3}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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