Optimal. Leaf size=87 \[ \frac{32 \sqrt{\pi } x^4 \left (a x^n\right )^{-4/n} \text{Erfi}\left (\frac{2 \sqrt{\log \left (a x^n\right )}}{\sqrt{n}}\right )}{3 n^{5/2}}-\frac{16 x^4}{3 n^2 \sqrt{\log \left (a x^n\right )}}-\frac{2 x^4}{3 n \log ^{\frac{3}{2}}\left (a x^n\right )} \]
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Rubi [A] time = 0.072671, antiderivative size = 87, 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 = {2306, 2310, 2180, 2204} \[ \frac{32 \sqrt{\pi } x^4 \left (a x^n\right )^{-4/n} \text{Erfi}\left (\frac{2 \sqrt{\log \left (a x^n\right )}}{\sqrt{n}}\right )}{3 n^{5/2}}-\frac{16 x^4}{3 n^2 \sqrt{\log \left (a x^n\right )}}-\frac{2 x^4}{3 n \log ^{\frac{3}{2}}\left (a x^n\right )} \]
Antiderivative was successfully verified.
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Rule 2306
Rule 2310
Rule 2180
Rule 2204
Rubi steps
\begin{align*} \int \frac{x^3}{\log ^{\frac{5}{2}}\left (a x^n\right )} \, dx &=-\frac{2 x^4}{3 n \log ^{\frac{3}{2}}\left (a x^n\right )}+\frac{8 \int \frac{x^3}{\log ^{\frac{3}{2}}\left (a x^n\right )} \, dx}{3 n}\\ &=-\frac{2 x^4}{3 n \log ^{\frac{3}{2}}\left (a x^n\right )}-\frac{16 x^4}{3 n^2 \sqrt{\log \left (a x^n\right )}}+\frac{64 \int \frac{x^3}{\sqrt{\log \left (a x^n\right )}} \, dx}{3 n^2}\\ &=-\frac{2 x^4}{3 n \log ^{\frac{3}{2}}\left (a x^n\right )}-\frac{16 x^4}{3 n^2 \sqrt{\log \left (a x^n\right )}}+\frac{\left (64 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 )}{3 n^3}\\ &=-\frac{2 x^4}{3 n \log ^{\frac{3}{2}}\left (a x^n\right )}-\frac{16 x^4}{3 n^2 \sqrt{\log \left (a x^n\right )}}+\frac{\left (128 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 )}{3 n^3}\\ &=\frac{32 \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 )}{3 n^{5/2}}-\frac{2 x^4}{3 n \log ^{\frac{3}{2}}\left (a x^n\right )}-\frac{16 x^4}{3 n^2 \sqrt{\log \left (a x^n\right )}}\\ \end{align*}
Mathematica [A] time = 0.059149, size = 87, normalized size = 1. \[ -\frac{2 x^4 \left (a x^n\right )^{-4/n} \left (16 n \left (-\frac{\log \left (a x^n\right )}{n}\right )^{3/2} \text{Gamma}\left (\frac{1}{2},-\frac{4 \log \left (a x^n\right )}{n}\right )+\left (a x^n\right )^{4/n} \left (8 \log \left (a x^n\right )+n\right )\right )}{3 n^2 \log ^{\frac{3}{2}}\left (a x^n\right )} \]
Antiderivative was successfully verified.
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Maple [F] time = 0.17, size = 0, normalized size = 0. \begin{align*} \int{{x}^{3} \left ( \ln \left ( a{x}^{n} \right ) \right ) ^{-{\frac{5}{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 \frac{x^{3}}{\log \left (a x^{n}\right )^{\frac{5}{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] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{x^{3}}{\log{\left (a x^{n} \right )}^{\frac{5}{2}}}\, dx \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 \frac{x^{3}}{\log \left (a x^{n}\right )^{\frac{5}{2}}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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