Optimal. Leaf size=144 \[ \frac{2 \sqrt [3]{b} \log \left (a^{2/3} x^2-\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3}\right )}{9 a^{7/3}}-\frac{4 \sqrt [3]{b} \log \left (\sqrt [3]{a} x+\sqrt [3]{b}\right )}{9 a^{7/3}}+\frac{4 \sqrt [3]{b} \tan ^{-1}\left (\frac{\sqrt [3]{b}-2 \sqrt [3]{a} x}{\sqrt{3} \sqrt [3]{b}}\right )}{3 \sqrt{3} a^{7/3}}+\frac{4 x}{3 a^2}-\frac{x^4}{3 a \left (a x^3+b\right )} \]
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Rubi [A] time = 0.0741316, antiderivative size = 144, normalized size of antiderivative = 1., number of steps used = 9, number of rules used = 9, integrand size = 9, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 1., Rules used = {193, 288, 321, 200, 31, 634, 617, 204, 628} \[ \frac{2 \sqrt [3]{b} \log \left (a^{2/3} x^2-\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3}\right )}{9 a^{7/3}}-\frac{4 \sqrt [3]{b} \log \left (\sqrt [3]{a} x+\sqrt [3]{b}\right )}{9 a^{7/3}}+\frac{4 \sqrt [3]{b} \tan ^{-1}\left (\frac{\sqrt [3]{b}-2 \sqrt [3]{a} x}{\sqrt{3} \sqrt [3]{b}}\right )}{3 \sqrt{3} a^{7/3}}+\frac{4 x}{3 a^2}-\frac{x^4}{3 a \left (a x^3+b\right )} \]
Antiderivative was successfully verified.
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Rule 193
Rule 288
Rule 321
Rule 200
Rule 31
Rule 634
Rule 617
Rule 204
Rule 628
Rubi steps
\begin{align*} \int \frac{1}{\left (a+\frac{b}{x^3}\right )^2} \, dx &=\int \frac{x^6}{\left (b+a x^3\right )^2} \, dx\\ &=-\frac{x^4}{3 a \left (b+a x^3\right )}+\frac{4 \int \frac{x^3}{b+a x^3} \, dx}{3 a}\\ &=\frac{4 x}{3 a^2}-\frac{x^4}{3 a \left (b+a x^3\right )}-\frac{(4 b) \int \frac{1}{b+a x^3} \, dx}{3 a^2}\\ &=\frac{4 x}{3 a^2}-\frac{x^4}{3 a \left (b+a x^3\right )}-\frac{\left (4 \sqrt [3]{b}\right ) \int \frac{1}{\sqrt [3]{b}+\sqrt [3]{a} x} \, dx}{9 a^2}-\frac{\left (4 \sqrt [3]{b}\right ) \int \frac{2 \sqrt [3]{b}-\sqrt [3]{a} x}{b^{2/3}-\sqrt [3]{a} \sqrt [3]{b} x+a^{2/3} x^2} \, dx}{9 a^2}\\ &=\frac{4 x}{3 a^2}-\frac{x^4}{3 a \left (b+a x^3\right )}-\frac{4 \sqrt [3]{b} \log \left (\sqrt [3]{b}+\sqrt [3]{a} x\right )}{9 a^{7/3}}+\frac{\left (2 \sqrt [3]{b}\right ) \int \frac{-\sqrt [3]{a} \sqrt [3]{b}+2 a^{2/3} x}{b^{2/3}-\sqrt [3]{a} \sqrt [3]{b} x+a^{2/3} x^2} \, dx}{9 a^{7/3}}-\frac{\left (2 b^{2/3}\right ) \int \frac{1}{b^{2/3}-\sqrt [3]{a} \sqrt [3]{b} x+a^{2/3} x^2} \, dx}{3 a^2}\\ &=\frac{4 x}{3 a^2}-\frac{x^4}{3 a \left (b+a x^3\right )}-\frac{4 \sqrt [3]{b} \log \left (\sqrt [3]{b}+\sqrt [3]{a} x\right )}{9 a^{7/3}}+\frac{2 \sqrt [3]{b} \log \left (b^{2/3}-\sqrt [3]{a} \sqrt [3]{b} x+a^{2/3} x^2\right )}{9 a^{7/3}}-\frac{\left (4 \sqrt [3]{b}\right ) \operatorname{Subst}\left (\int \frac{1}{-3-x^2} \, dx,x,1-\frac{2 \sqrt [3]{a} x}{\sqrt [3]{b}}\right )}{3 a^{7/3}}\\ &=\frac{4 x}{3 a^2}-\frac{x^4}{3 a \left (b+a x^3\right )}+\frac{4 \sqrt [3]{b} \tan ^{-1}\left (\frac{\sqrt [3]{b}-2 \sqrt [3]{a} x}{\sqrt{3} \sqrt [3]{b}}\right )}{3 \sqrt{3} a^{7/3}}-\frac{4 \sqrt [3]{b} \log \left (\sqrt [3]{b}+\sqrt [3]{a} x\right )}{9 a^{7/3}}+\frac{2 \sqrt [3]{b} \log \left (b^{2/3}-\sqrt [3]{a} \sqrt [3]{b} x+a^{2/3} x^2\right )}{9 a^{7/3}}\\ \end{align*}
Mathematica [A] time = 0.0756531, size = 127, normalized size = 0.88 \[ \frac{2 \sqrt [3]{b} \log \left (a^{2/3} x^2-\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3}\right )+\frac{3 \sqrt [3]{a} b x}{a x^3+b}-4 \sqrt [3]{b} \log \left (\sqrt [3]{a} x+\sqrt [3]{b}\right )+4 \sqrt{3} \sqrt [3]{b} \tan ^{-1}\left (\frac{1-\frac{2 \sqrt [3]{a} x}{\sqrt [3]{b}}}{\sqrt{3}}\right )+9 \sqrt [3]{a} x}{9 a^{7/3}} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.007, size = 115, normalized size = 0.8 \begin{align*}{\frac{x}{{a}^{2}}}+{\frac{bx}{3\,{a}^{2} \left ( a{x}^{3}+b \right ) }}-{\frac{4\,b}{9\,{a}^{3}}\ln \left ( x+\sqrt [3]{{\frac{b}{a}}} \right ) \left ({\frac{b}{a}} \right ) ^{-{\frac{2}{3}}}}+{\frac{2\,b}{9\,{a}^{3}}\ln \left ({x}^{2}-\sqrt [3]{{\frac{b}{a}}}x+ \left ({\frac{b}{a}} \right ) ^{{\frac{2}{3}}} \right ) \left ({\frac{b}{a}} \right ) ^{-{\frac{2}{3}}}}-{\frac{4\,b\sqrt{3}}{9\,{a}^{3}}\arctan \left ({\frac{\sqrt{3}}{3} \left ( 2\,{x{\frac{1}{\sqrt [3]{{\frac{b}{a}}}}}}-1 \right ) } \right ) \left ({\frac{b}{a}} \right ) ^{-{\frac{2}{3}}}} \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 [A] time = 1.52543, size = 344, normalized size = 2.39 \begin{align*} \frac{9 \, a x^{4} + 4 \, \sqrt{3}{\left (a x^{3} + b\right )} \left (-\frac{b}{a}\right )^{\frac{1}{3}} \arctan \left (\frac{2 \, \sqrt{3} a x \left (-\frac{b}{a}\right )^{\frac{2}{3}} - \sqrt{3} b}{3 \, b}\right ) - 2 \,{\left (a x^{3} + b\right )} \left (-\frac{b}{a}\right )^{\frac{1}{3}} \log \left (x^{2} + x \left (-\frac{b}{a}\right )^{\frac{1}{3}} + \left (-\frac{b}{a}\right )^{\frac{2}{3}}\right ) + 4 \,{\left (a x^{3} + b\right )} \left (-\frac{b}{a}\right )^{\frac{1}{3}} \log \left (x - \left (-\frac{b}{a}\right )^{\frac{1}{3}}\right ) + 12 \, b x}{9 \,{\left (a^{3} x^{3} + a^{2} b\right )}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.600503, size = 48, normalized size = 0.33 \begin{align*} \frac{b x}{3 a^{3} x^{3} + 3 a^{2} b} + \operatorname{RootSum}{\left (729 t^{3} a^{7} + 64 b, \left ( t \mapsto t \log{\left (- \frac{9 t a^{2}}{4} + x \right )} \right )\right )} + \frac{x}{a^{2}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.22723, size = 171, normalized size = 1.19 \begin{align*} \frac{4 \, \left (-\frac{b}{a}\right )^{\frac{1}{3}} \log \left ({\left | x - \left (-\frac{b}{a}\right )^{\frac{1}{3}} \right |}\right )}{9 \, a^{2}} + \frac{x}{a^{2}} + \frac{b x}{3 \,{\left (a x^{3} + b\right )} a^{2}} - \frac{4 \, \sqrt{3} \left (-a^{2} b\right )^{\frac{1}{3}} \arctan \left (\frac{\sqrt{3}{\left (2 \, x + \left (-\frac{b}{a}\right )^{\frac{1}{3}}\right )}}{3 \, \left (-\frac{b}{a}\right )^{\frac{1}{3}}}\right )}{9 \, a^{3}} - \frac{2 \, \left (-a^{2} b\right )^{\frac{1}{3}} \log \left (x^{2} + x \left (-\frac{b}{a}\right )^{\frac{1}{3}} + \left (-\frac{b}{a}\right )^{\frac{2}{3}}\right )}{9 \, a^{3}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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