Optimal. Leaf size=143 \[ \frac{i e^{i a} x^3 \left (-i b x^n\right )^{-3/n} \text{Gamma}\left (\frac{3}{n},-i b x^n\right ) \csc \left (a+b x^n\right ) \sqrt [3]{c \sin ^3\left (a+b x^n\right )}}{2 n}-\frac{i e^{-i a} x^3 \left (i b x^n\right )^{-3/n} \text{Gamma}\left (\frac{3}{n},i b x^n\right ) \csc \left (a+b x^n\right ) \sqrt [3]{c \sin ^3\left (a+b x^n\right )}}{2 n} \]
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Rubi [A] time = 0.266028, antiderivative size = 143, normalized size of antiderivative = 1., number of steps used = 4, number of rules used = 3, integrand size = 20, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.15, Rules used = {6720, 3423, 2218} \[ \frac{i e^{i a} x^3 \left (-i b x^n\right )^{-3/n} \text{Gamma}\left (\frac{3}{n},-i b x^n\right ) \csc \left (a+b x^n\right ) \sqrt [3]{c \sin ^3\left (a+b x^n\right )}}{2 n}-\frac{i e^{-i a} x^3 \left (i b x^n\right )^{-3/n} \text{Gamma}\left (\frac{3}{n},i b x^n\right ) \csc \left (a+b x^n\right ) \sqrt [3]{c \sin ^3\left (a+b x^n\right )}}{2 n} \]
Antiderivative was successfully verified.
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Rule 6720
Rule 3423
Rule 2218
Rubi steps
\begin{align*} \int x^2 \sqrt [3]{c \sin ^3\left (a+b x^n\right )} \, dx &=\left (\csc \left (a+b x^n\right ) \sqrt [3]{c \sin ^3\left (a+b x^n\right )}\right ) \int x^2 \sin \left (a+b x^n\right ) \, dx\\ &=\frac{1}{2} \left (i \csc \left (a+b x^n\right ) \sqrt [3]{c \sin ^3\left (a+b x^n\right )}\right ) \int e^{-i a-i b x^n} x^2 \, dx-\frac{1}{2} \left (i \csc \left (a+b x^n\right ) \sqrt [3]{c \sin ^3\left (a+b x^n\right )}\right ) \int e^{i a+i b x^n} x^2 \, dx\\ &=\frac{i e^{i a} x^3 \left (-i b x^n\right )^{-3/n} \csc \left (a+b x^n\right ) \Gamma \left (\frac{3}{n},-i b x^n\right ) \sqrt [3]{c \sin ^3\left (a+b x^n\right )}}{2 n}-\frac{i e^{-i a} x^3 \left (i b x^n\right )^{-3/n} \csc \left (a+b x^n\right ) \Gamma \left (\frac{3}{n},i b x^n\right ) \sqrt [3]{c \sin ^3\left (a+b x^n\right )}}{2 n}\\ \end{align*}
Mathematica [A] time = 0.187471, size = 129, normalized size = 0.9 \[ \frac{i x^3 \left (b^2 x^{2 n}\right )^{-3/n} \csc \left (a+b x^n\right ) \sqrt [3]{c \sin ^3\left (a+b x^n\right )} \left ((\cos (a)+i \sin (a)) \left (i b x^n\right )^{3/n} \text{Gamma}\left (\frac{3}{n},-i b x^n\right )-(\cos (a)-i \sin (a)) \left (-i b x^n\right )^{3/n} \text{Gamma}\left (\frac{3}{n},i b x^n\right )\right )}{2 n} \]
Antiderivative was successfully verified.
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Maple [F] time = 0.182, size = 0, normalized size = 0. \begin{align*} \int{x}^{2}\sqrt [3]{c \left ( \sin \left ( a+b{x}^{n} \right ) \right ) ^{3}}\, 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 \left (c \sin \left (b x^{n} + a\right )^{3}\right )^{\frac{1}{3}} x^{2}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [F] time = 0., size = 0, normalized size = 0. \begin{align*}{\rm integral}\left (\left (-{\left (c \cos \left (b x^{n} + a\right )^{2} - c\right )} \sin \left (b x^{n} + a\right )\right )^{\frac{1}{3}} x^{2}, x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F(-1)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Timed out} \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 \left (c \sin \left (b x^{n} + a\right )^{3}\right )^{\frac{1}{3}} x^{2}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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