Integrand size = 10, antiderivative size = 167 \[ \int x^3 \arcsin (a x)^n \, dx=-\frac {2^{-4-n} (-i \arcsin (a x))^{-n} \arcsin (a x)^n \Gamma (1+n,-2 i \arcsin (a x))}{a^4}-\frac {2^{-4-n} (i \arcsin (a x))^{-n} \arcsin (a x)^n \Gamma (1+n,2 i \arcsin (a x))}{a^4}+\frac {2^{-2 (3+n)} (-i \arcsin (a x))^{-n} \arcsin (a x)^n \Gamma (1+n,-4 i \arcsin (a x))}{a^4}+\frac {2^{-2 (3+n)} (i \arcsin (a x))^{-n} \arcsin (a x)^n \Gamma (1+n,4 i \arcsin (a x))}{a^4} \]
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Time = 0.11 (sec) , antiderivative size = 167, normalized size of antiderivative = 1.00, number of steps used = 9, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.400, Rules used = {4731, 4491, 3389, 2212} \[ \int x^3 \arcsin (a x)^n \, dx=-\frac {2^{-n-4} \arcsin (a x)^n (-i \arcsin (a x))^{-n} \Gamma (n+1,-2 i \arcsin (a x))}{a^4}+\frac {2^{-2 (n+3)} \arcsin (a x)^n (-i \arcsin (a x))^{-n} \Gamma (n+1,-4 i \arcsin (a x))}{a^4}-\frac {2^{-n-4} (i \arcsin (a x))^{-n} \arcsin (a x)^n \Gamma (n+1,2 i \arcsin (a x))}{a^4}+\frac {2^{-2 (n+3)} (i \arcsin (a x))^{-n} \arcsin (a x)^n \Gamma (n+1,4 i \arcsin (a x))}{a^4} \]
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Rule 2212
Rule 3389
Rule 4491
Rule 4731
Rubi steps \begin{align*} \text {integral}& = \frac {\text {Subst}\left (\int x^n \cos (x) \sin ^3(x) \, dx,x,\arcsin (a x)\right )}{a^4} \\ & = \frac {\text {Subst}\left (\int \left (\frac {1}{4} x^n \sin (2 x)-\frac {1}{8} x^n \sin (4 x)\right ) \, dx,x,\arcsin (a x)\right )}{a^4} \\ & = -\frac {\text {Subst}\left (\int x^n \sin (4 x) \, dx,x,\arcsin (a x)\right )}{8 a^4}+\frac {\text {Subst}\left (\int x^n \sin (2 x) \, dx,x,\arcsin (a x)\right )}{4 a^4} \\ & = -\frac {i \text {Subst}\left (\int e^{-4 i x} x^n \, dx,x,\arcsin (a x)\right )}{16 a^4}+\frac {i \text {Subst}\left (\int e^{4 i x} x^n \, dx,x,\arcsin (a x)\right )}{16 a^4}+\frac {i \text {Subst}\left (\int e^{-2 i x} x^n \, dx,x,\arcsin (a x)\right )}{8 a^4}-\frac {i \text {Subst}\left (\int e^{2 i x} x^n \, dx,x,\arcsin (a x)\right )}{8 a^4} \\ & = -\frac {2^{-4-n} (-i \arcsin (a x))^{-n} \arcsin (a x)^n \Gamma (1+n,-2 i \arcsin (a x))}{a^4}-\frac {2^{-4-n} (i \arcsin (a x))^{-n} \arcsin (a x)^n \Gamma (1+n,2 i \arcsin (a x))}{a^4}+\frac {4^{-3-n} (-i \arcsin (a x))^{-n} \arcsin (a x)^n \Gamma (1+n,-4 i \arcsin (a x))}{a^4}+\frac {4^{-3-n} (i \arcsin (a x))^{-n} \arcsin (a x)^n \Gamma (1+n,4 i \arcsin (a x))}{a^4} \\ \end{align*}
Time = 0.07 (sec) , antiderivative size = 132, normalized size of antiderivative = 0.79 \[ \int x^3 \arcsin (a x)^n \, dx=\frac {4^{-3-n} \arcsin (a x)^n \left (\arcsin (a x)^2\right )^{-n} \left (-2^{2+n} (i \arcsin (a x))^n \Gamma (1+n,-2 i \arcsin (a x))-2^{2+n} (-i \arcsin (a x))^n \Gamma (1+n,2 i \arcsin (a x))+(i \arcsin (a x))^n \Gamma (1+n,-4 i \arcsin (a x))+(-i \arcsin (a x))^n \Gamma (1+n,4 i \arcsin (a x))\right )}{a^4} \]
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\[\int x^{3} \arcsin \left (a x \right )^{n}d x\]
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\[ \int x^3 \arcsin (a x)^n \, dx=\int { x^{3} \arcsin \left (a x\right )^{n} \,d x } \]
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\[ \int x^3 \arcsin (a x)^n \, dx=\int x^{3} \operatorname {asin}^{n}{\left (a x \right )}\, dx \]
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Exception generated. \[ \int x^3 \arcsin (a x)^n \, dx=\text {Exception raised: RuntimeError} \]
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\[ \int x^3 \arcsin (a x)^n \, dx=\int { x^{3} \arcsin \left (a x\right )^{n} \,d x } \]
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Timed out. \[ \int x^3 \arcsin (a x)^n \, dx=\int x^3\,{\mathrm {asin}\left (a\,x\right )}^n \,d x \]
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