Optimal. Leaf size=333 \[ -\frac{i x \text{PolyLog}\left (2,-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^2(f)}+\frac{i \text{PolyLog}\left (2,-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}+\frac{i x \text{PolyLog}\left (2,\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^2(f)}-\frac{i \text{PolyLog}\left (2,\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}+\frac{i \text{PolyLog}\left (3,-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}-\frac{i \text{PolyLog}\left (3,\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}+\frac{x^2 \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log (f)}-\frac{x \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{a^{3/2} \sqrt{b} \log ^2(f)}+\frac{x^2 f^x}{2 a \log (f) \left (a+b f^{2 x}\right )} \]
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Rubi [A] time = 0.364925, antiderivative size = 333, normalized size of antiderivative = 1., number of steps used = 16, number of rules used = 12, integrand size = 18, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.667, Rules used = {2249, 199, 205, 2245, 14, 12, 2282, 4848, 2391, 5143, 2531, 6589} \[ -\frac{i x \text{PolyLog}\left (2,-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^2(f)}+\frac{i \text{PolyLog}\left (2,-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}+\frac{i x \text{PolyLog}\left (2,\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^2(f)}-\frac{i \text{PolyLog}\left (2,\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}+\frac{i \text{PolyLog}\left (3,-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}-\frac{i \text{PolyLog}\left (3,\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}+\frac{x^2 \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log (f)}-\frac{x \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{a^{3/2} \sqrt{b} \log ^2(f)}+\frac{x^2 f^x}{2 a \log (f) \left (a+b f^{2 x}\right )} \]
Antiderivative was successfully verified.
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Rule 2249
Rule 199
Rule 205
Rule 2245
Rule 14
Rule 12
Rule 2282
Rule 4848
Rule 2391
Rule 5143
Rule 2531
Rule 6589
Rubi steps
\begin{align*} \int \frac{f^x x^2}{\left (a+b f^{2 x}\right )^2} \, dx &=\frac{f^x x^2}{2 a \left (a+b f^{2 x}\right ) \log (f)}+\frac{x^2 \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log (f)}-2 \int x \left (\frac{f^x}{2 a \left (a+b f^{2 x}\right ) \log (f)}+\frac{\tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log (f)}\right ) \, dx\\ &=\frac{f^x x^2}{2 a \left (a+b f^{2 x}\right ) \log (f)}+\frac{x^2 \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log (f)}-2 \int \left (\frac{f^x x}{2 a \left (a+b f^{2 x}\right ) \log (f)}+\frac{x \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log (f)}\right ) \, dx\\ &=\frac{f^x x^2}{2 a \left (a+b f^{2 x}\right ) \log (f)}+\frac{x^2 \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log (f)}-\frac{\int \frac{f^x x}{a+b f^{2 x}} \, dx}{a \log (f)}-\frac{\int x \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right ) \, dx}{a^{3/2} \sqrt{b} \log (f)}\\ &=-\frac{x \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{a^{3/2} \sqrt{b} \log ^2(f)}+\frac{f^x x^2}{2 a \left (a+b f^{2 x}\right ) \log (f)}+\frac{x^2 \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log (f)}+\frac{\int \frac{\tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{\sqrt{a} \sqrt{b} \log (f)} \, dx}{a \log (f)}-\frac{i \int x \log \left (1-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right ) \, dx}{2 a^{3/2} \sqrt{b} \log (f)}+\frac{i \int x \log \left (1+\frac{i \sqrt{b} f^x}{\sqrt{a}}\right ) \, dx}{2 a^{3/2} \sqrt{b} \log (f)}\\ &=-\frac{x \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{a^{3/2} \sqrt{b} \log ^2(f)}+\frac{f^x x^2}{2 a \left (a+b f^{2 x}\right ) \log (f)}+\frac{x^2 \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log (f)}-\frac{i x \text{Li}_2\left (-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^2(f)}+\frac{i x \text{Li}_2\left (\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^2(f)}+\frac{i \int \text{Li}_2\left (-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right ) \, dx}{2 a^{3/2} \sqrt{b} \log ^2(f)}-\frac{i \int \text{Li}_2\left (\frac{i \sqrt{b} f^x}{\sqrt{a}}\right ) \, dx}{2 a^{3/2} \sqrt{b} \log ^2(f)}+\frac{\int \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right ) \, dx}{a^{3/2} \sqrt{b} \log ^2(f)}\\ &=-\frac{x \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{a^{3/2} \sqrt{b} \log ^2(f)}+\frac{f^x x^2}{2 a \left (a+b f^{2 x}\right ) \log (f)}+\frac{x^2 \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log (f)}-\frac{i x \text{Li}_2\left (-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^2(f)}+\frac{i x \text{Li}_2\left (\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^2(f)}+\frac{i \operatorname{Subst}\left (\int \frac{\text{Li}_2\left (-\frac{i \sqrt{b} x}{\sqrt{a}}\right )}{x} \, dx,x,f^x\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}-\frac{i \operatorname{Subst}\left (\int \frac{\text{Li}_2\left (\frac{i \sqrt{b} x}{\sqrt{a}}\right )}{x} \, dx,x,f^x\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}+\frac{\operatorname{Subst}\left (\int \frac{\tan ^{-1}\left (\frac{\sqrt{b} x}{\sqrt{a}}\right )}{x} \, dx,x,f^x\right )}{a^{3/2} \sqrt{b} \log ^3(f)}\\ &=-\frac{x \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{a^{3/2} \sqrt{b} \log ^2(f)}+\frac{f^x x^2}{2 a \left (a+b f^{2 x}\right ) \log (f)}+\frac{x^2 \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log (f)}-\frac{i x \text{Li}_2\left (-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^2(f)}+\frac{i x \text{Li}_2\left (\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^2(f)}+\frac{i \text{Li}_3\left (-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}-\frac{i \text{Li}_3\left (\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}+\frac{i \operatorname{Subst}\left (\int \frac{\log \left (1-\frac{i \sqrt{b} x}{\sqrt{a}}\right )}{x} \, dx,x,f^x\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}-\frac{i \operatorname{Subst}\left (\int \frac{\log \left (1+\frac{i \sqrt{b} x}{\sqrt{a}}\right )}{x} \, dx,x,f^x\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}\\ &=-\frac{x \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{a^{3/2} \sqrt{b} \log ^2(f)}+\frac{f^x x^2}{2 a \left (a+b f^{2 x}\right ) \log (f)}+\frac{x^2 \tan ^{-1}\left (\frac{\sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log (f)}+\frac{i \text{Li}_2\left (-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}-\frac{i x \text{Li}_2\left (-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^2(f)}-\frac{i \text{Li}_2\left (\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}+\frac{i x \text{Li}_2\left (\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^2(f)}+\frac{i \text{Li}_3\left (-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}-\frac{i \text{Li}_3\left (\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{2 a^{3/2} \sqrt{b} \log ^3(f)}\\ \end{align*}
Mathematica [A] time = 0.121893, size = 477, normalized size = 1.43 \[ -\frac{\frac{-\frac{i \text{PolyLog}\left (2,-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{\sqrt{a} \log ^2(f)}-\frac{i x \log \left (1+\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{\sqrt{a} \log (f)}+\frac{i x^2}{2 \sqrt{a}}}{2 \sqrt{b}}+\frac{\frac{i \text{PolyLog}\left (2,\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{\sqrt{a} \log ^2(f)}+\frac{i x \log \left (1-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{\sqrt{a} \log (f)}-\frac{i x^2}{2 \sqrt{a}}}{2 \sqrt{b}}}{a \log (f)}+\frac{\frac{-\frac{2 i x \text{PolyLog}\left (2,-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{\sqrt{a} \log ^2(f)}+\frac{2 i \text{PolyLog}\left (3,-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{\sqrt{a} \log ^3(f)}-\frac{i x^2 \log \left (1+\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{\sqrt{a} \log (f)}+\frac{i x^3}{3 \sqrt{a}}}{2 \sqrt{b}}+\frac{\frac{2 i x \text{PolyLog}\left (2,\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{\sqrt{a} \log ^2(f)}-\frac{2 i \text{PolyLog}\left (3,\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{\sqrt{a} \log ^3(f)}+\frac{i x^2 \log \left (1-\frac{i \sqrt{b} f^x}{\sqrt{a}}\right )}{\sqrt{a} \log (f)}-\frac{i x^3}{3 \sqrt{a}}}{2 \sqrt{b}}}{2 a}+\frac{x^2 f^x}{2 a \log (f) \left (a+b f^{2 x}\right )} \]
Antiderivative was successfully verified.
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Maple [F] time = 0.133, size = 0, normalized size = 0. \begin{align*} \int{\frac{{f}^{x}{x}^{2}}{ \left ( a+b{f}^{2\,x} \right ) ^{2}}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: ValueError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [C] time = 1.5916, size = 873, normalized size = 2.62 \begin{align*} \frac{2 \, b f^{x} x^{2} \log \left (f\right )^{2} + 2 \,{\left ({\left (b x \log \left (f\right ) - b\right )} f^{2 \, x} \sqrt{-\frac{b}{a}} +{\left (a x \log \left (f\right ) - a\right )} \sqrt{-\frac{b}{a}}\right )}{\rm Li}_2\left (f^{x} \sqrt{-\frac{b}{a}}\right ) - 2 \,{\left ({\left (b x \log \left (f\right ) - b\right )} f^{2 \, x} \sqrt{-\frac{b}{a}} +{\left (a x \log \left (f\right ) - a\right )} \sqrt{-\frac{b}{a}}\right )}{\rm Li}_2\left (-f^{x} \sqrt{-\frac{b}{a}}\right ) -{\left ({\left (b x^{2} \log \left (f\right )^{2} - 2 \, b x \log \left (f\right )\right )} f^{2 \, x} \sqrt{-\frac{b}{a}} +{\left (a x^{2} \log \left (f\right )^{2} - 2 \, a x \log \left (f\right )\right )} \sqrt{-\frac{b}{a}}\right )} \log \left (f^{x} \sqrt{-\frac{b}{a}} + 1\right ) +{\left ({\left (b x^{2} \log \left (f\right )^{2} - 2 \, b x \log \left (f\right )\right )} f^{2 \, x} \sqrt{-\frac{b}{a}} +{\left (a x^{2} \log \left (f\right )^{2} - 2 \, a x \log \left (f\right )\right )} \sqrt{-\frac{b}{a}}\right )} \log \left (-f^{x} \sqrt{-\frac{b}{a}} + 1\right ) - 2 \,{\left (b f^{2 \, x} \sqrt{-\frac{b}{a}} + a \sqrt{-\frac{b}{a}}\right )}{\rm polylog}\left (3, f^{x} \sqrt{-\frac{b}{a}}\right ) + 2 \,{\left (b f^{2 \, x} \sqrt{-\frac{b}{a}} + a \sqrt{-\frac{b}{a}}\right )}{\rm polylog}\left (3, -f^{x} \sqrt{-\frac{b}{a}}\right )}{4 \,{\left (a b^{2} f^{2 \, x} \log \left (f\right )^{3} + a^{2} b \log \left (f\right )^{3}\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*} \frac{f^{x} x^{2}}{2 a^{2} \log{\left (f \right )} + 2 a b f^{2 x} \log{\left (f \right )}} + \frac{\int - \frac{2 f^{x} x}{a + b f^{2 x}}\, dx + \int \frac{f^{x} x^{2} \log{\left (f \right )}}{a + b f^{2 x}}\, dx}{2 a \log{\left (f \right )}} \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{f^{x} x^{2}}{{\left (b f^{2 \, x} + a\right )}^{2}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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