Optimal. Leaf size=82 \[ \frac{3}{128} \sqrt{\pi } n^{3/2} x^4 \left (a x^n\right )^{-4/n} \text{Erfi}\left (\frac{2 \sqrt{\log \left (a x^n\right )}}{\sqrt{n}}\right )+\frac{1}{4} x^4 \log ^{\frac{3}{2}}\left (a x^n\right )-\frac{3}{32} n x^4 \sqrt{\log \left (a x^n\right )} \]
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Rubi [A] time = 0.0675935, antiderivative size = 82, normalized size of antiderivative = 1., number of steps used = 5, number of rules used = 4, integrand size = 14, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.286, Rules used = {2305, 2310, 2180, 2204} \[ \frac{3}{128} \sqrt{\pi } n^{3/2} x^4 \left (a x^n\right )^{-4/n} \text{Erfi}\left (\frac{2 \sqrt{\log \left (a x^n\right )}}{\sqrt{n}}\right )+\frac{1}{4} x^4 \log ^{\frac{3}{2}}\left (a x^n\right )-\frac{3}{32} n x^4 \sqrt{\log \left (a x^n\right )} \]
Antiderivative was successfully verified.
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Rule 2305
Rule 2310
Rule 2180
Rule 2204
Rubi steps
\begin{align*} \int x^3 \log ^{\frac{3}{2}}\left (a x^n\right ) \, dx &=\frac{1}{4} x^4 \log ^{\frac{3}{2}}\left (a x^n\right )-\frac{1}{8} (3 n) \int x^3 \sqrt{\log \left (a x^n\right )} \, dx\\ &=-\frac{3}{32} n x^4 \sqrt{\log \left (a x^n\right )}+\frac{1}{4} x^4 \log ^{\frac{3}{2}}\left (a x^n\right )+\frac{1}{64} \left (3 n^2\right ) \int \frac{x^3}{\sqrt{\log \left (a x^n\right )}} \, dx\\ &=-\frac{3}{32} n x^4 \sqrt{\log \left (a x^n\right )}+\frac{1}{4} x^4 \log ^{\frac{3}{2}}\left (a x^n\right )+\frac{1}{64} \left (3 n x^4 \left (a x^n\right )^{-4/n}\right ) \operatorname{Subst}\left (\int \frac{e^{\frac{4 x}{n}}}{\sqrt{x}} \, dx,x,\log \left (a x^n\right )\right )\\ &=-\frac{3}{32} n x^4 \sqrt{\log \left (a x^n\right )}+\frac{1}{4} x^4 \log ^{\frac{3}{2}}\left (a x^n\right )+\frac{1}{32} \left (3 n x^4 \left (a x^n\right )^{-4/n}\right ) \operatorname{Subst}\left (\int e^{\frac{4 x^2}{n}} \, dx,x,\sqrt{\log \left (a x^n\right )}\right )\\ &=\frac{3}{128} n^{3/2} \sqrt{\pi } x^4 \left (a x^n\right )^{-4/n} \text{erfi}\left (\frac{2 \sqrt{\log \left (a x^n\right )}}{\sqrt{n}}\right )-\frac{3}{32} n x^4 \sqrt{\log \left (a x^n\right )}+\frac{1}{4} x^4 \log ^{\frac{3}{2}}\left (a x^n\right )\\ \end{align*}
Mathematica [A] time = 0.0428653, size = 73, normalized size = 0.89 \[ \frac{1}{128} x^4 \left (3 \sqrt{\pi } n^{3/2} \left (a x^n\right )^{-4/n} \text{Erfi}\left (\frac{2 \sqrt{\log \left (a x^n\right )}}{\sqrt{n}}\right )+4 \sqrt{\log \left (a x^n\right )} \left (8 \log \left (a x^n\right )-3 n\right )\right ) \]
Antiderivative was successfully verified.
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Maple [F] time = 0.166, size = 0, normalized size = 0. \begin{align*} \int{x}^{3} \left ( \ln \left ( a{x}^{n} \right ) \right ) ^{{\frac{3}{2}}}\, 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 x^{3} \log \left (a x^{n}\right )^{\frac{3}{2}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: UnboundLocalError} \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 x^{3} \log \left (a x^{n}\right )^{\frac{3}{2}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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