Optimal. Leaf size=100 \[ \frac{2 e^{\frac{2 a}{b n}} \left (c x^n\right )^{2/n} \text{Ei}\left (-\frac{2 \left (a+b \log \left (c x^n\right )\right )}{b n}\right )}{b^3 n^3 x^2}+\frac{1}{b^2 n^2 x^2 \left (a+b \log \left (c x^n\right )\right )}-\frac{1}{2 b n x^2 \left (a+b \log \left (c x^n\right )\right )^2} \]
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Rubi [A] time = 0.108335, antiderivative size = 100, normalized size of antiderivative = 1., number of steps used = 4, number of rules used = 3, integrand size = 16, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.188, Rules used = {2306, 2310, 2178} \[ \frac{2 e^{\frac{2 a}{b n}} \left (c x^n\right )^{2/n} \text{Ei}\left (-\frac{2 \left (a+b \log \left (c x^n\right )\right )}{b n}\right )}{b^3 n^3 x^2}+\frac{1}{b^2 n^2 x^2 \left (a+b \log \left (c x^n\right )\right )}-\frac{1}{2 b n x^2 \left (a+b \log \left (c x^n\right )\right )^2} \]
Antiderivative was successfully verified.
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Rule 2306
Rule 2310
Rule 2178
Rubi steps
\begin{align*} \int \frac{1}{x^3 \left (a+b \log \left (c x^n\right )\right )^3} \, dx &=-\frac{1}{2 b n x^2 \left (a+b \log \left (c x^n\right )\right )^2}-\frac{\int \frac{1}{x^3 \left (a+b \log \left (c x^n\right )\right )^2} \, dx}{b n}\\ &=-\frac{1}{2 b n x^2 \left (a+b \log \left (c x^n\right )\right )^2}+\frac{1}{b^2 n^2 x^2 \left (a+b \log \left (c x^n\right )\right )}+\frac{2 \int \frac{1}{x^3 \left (a+b \log \left (c x^n\right )\right )} \, dx}{b^2 n^2}\\ &=-\frac{1}{2 b n x^2 \left (a+b \log \left (c x^n\right )\right )^2}+\frac{1}{b^2 n^2 x^2 \left (a+b \log \left (c x^n\right )\right )}+\frac{\left (2 \left (c x^n\right )^{2/n}\right ) \operatorname{Subst}\left (\int \frac{e^{-\frac{2 x}{n}}}{a+b x} \, dx,x,\log \left (c x^n\right )\right )}{b^2 n^3 x^2}\\ &=\frac{2 e^{\frac{2 a}{b n}} \left (c x^n\right )^{2/n} \text{Ei}\left (-\frac{2 \left (a+b \log \left (c x^n\right )\right )}{b n}\right )}{b^3 n^3 x^2}-\frac{1}{2 b n x^2 \left (a+b \log \left (c x^n\right )\right )^2}+\frac{1}{b^2 n^2 x^2 \left (a+b \log \left (c x^n\right )\right )}\\ \end{align*}
Mathematica [A] time = 0.118754, size = 89, normalized size = 0.89 \[ \frac{4 e^{\frac{2 a}{b n}} \left (c x^n\right )^{2/n} \text{Ei}\left (-\frac{2 \left (a+b \log \left (c x^n\right )\right )}{b n}\right )+\frac{b n \left (2 a+2 b \log \left (c x^n\right )-b n\right )}{\left (a+b \log \left (c x^n\right )\right )^2}}{2 b^3 n^3 x^2} \]
Antiderivative was successfully verified.
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Maple [F] time = 0.709, size = 0, normalized size = 0. \begin{align*} \int{\frac{1}{{x}^{3} \left ( a+b\ln \left ( c{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*} -\frac{b{\left (n - 2 \, \log \left (c\right )\right )} - 2 \, b \log \left (x^{n}\right ) - 2 \, a}{2 \,{\left (b^{4} n^{2} x^{2} \log \left (x^{n}\right )^{2} + 2 \,{\left (b^{4} n^{2} \log \left (c\right ) + a b^{3} n^{2}\right )} x^{2} \log \left (x^{n}\right ) +{\left (b^{4} n^{2} \log \left (c\right )^{2} + 2 \, a b^{3} n^{2} \log \left (c\right ) + a^{2} b^{2} n^{2}\right )} x^{2}\right )}} + 2 \, \int \frac{1}{b^{3} n^{2} x^{3} \log \left (x^{n}\right ) +{\left (b^{3} n^{2} \log \left (c\right ) + a b^{2} n^{2}\right )} x^{3}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] time = 0.738526, size = 524, normalized size = 5.24 \begin{align*} \frac{2 \, b^{2} n^{2} \log \left (x\right ) - b^{2} n^{2} + 2 \, b^{2} n \log \left (c\right ) + 2 \, a b n + 4 \,{\left (b^{2} n^{2} x^{2} \log \left (x\right )^{2} + b^{2} x^{2} \log \left (c\right )^{2} + 2 \, a b x^{2} \log \left (c\right ) + a^{2} x^{2} + 2 \,{\left (b^{2} n x^{2} \log \left (c\right ) + a b n x^{2}\right )} \log \left (x\right )\right )} e^{\left (\frac{2 \,{\left (b \log \left (c\right ) + a\right )}}{b n}\right )} \logintegral \left (\frac{e^{\left (-\frac{2 \,{\left (b \log \left (c\right ) + a\right )}}{b n}\right )}}{x^{2}}\right )}{2 \,{\left (b^{5} n^{5} x^{2} \log \left (x\right )^{2} + b^{5} n^{3} x^{2} \log \left (c\right )^{2} + 2 \, a b^{4} n^{3} x^{2} \log \left (c\right ) + a^{2} b^{3} n^{3} x^{2} + 2 \,{\left (b^{5} n^{4} x^{2} \log \left (c\right ) + a b^{4} n^{4} x^{2}\right )} \log \left (x\right )\right )}} \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{1}{x^{3} \left (a + b \log{\left (c x^{n} \right )}\right )^{3}}\, 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{1}{{\left (b \log \left (c x^{n}\right ) + a\right )}^{3} x^{3}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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