Optimal. Leaf size=120 \[ \frac {\sqrt [3]{a} \log \left (a^{2/3}+\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3} x^2\right )}{6 b^{4/3}}-\frac {\sqrt [3]{a} \log \left (\sqrt [3]{a}-\sqrt [3]{b} x\right )}{3 b^{4/3}}+\frac {\sqrt [3]{a} \tan ^{-1}\left (\frac {\sqrt [3]{a}+2 \sqrt [3]{b} x}{\sqrt {3} \sqrt [3]{a}}\right )}{\sqrt {3} b^{4/3}}-\frac {x}{b} \]
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Rubi [A] time = 0.06, antiderivative size = 120, normalized size of antiderivative = 1.00, number of steps used = 7, number of rules used = 7, integrand size = 14, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.500, Rules used = {321, 200, 31, 634, 617, 204, 628} \[ \frac {\sqrt [3]{a} \log \left (a^{2/3}+\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3} x^2\right )}{6 b^{4/3}}-\frac {\sqrt [3]{a} \log \left (\sqrt [3]{a}-\sqrt [3]{b} x\right )}{3 b^{4/3}}+\frac {\sqrt [3]{a} \tan ^{-1}\left (\frac {\sqrt [3]{a}+2 \sqrt [3]{b} x}{\sqrt {3} \sqrt [3]{a}}\right )}{\sqrt {3} b^{4/3}}-\frac {x}{b} \]
Antiderivative was successfully verified.
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Rule 31
Rule 200
Rule 204
Rule 321
Rule 617
Rule 628
Rule 634
Rubi steps
\begin {align*} \int \frac {x^3}{a-b x^3} \, dx &=-\frac {x}{b}+\frac {a \int \frac {1}{a-b x^3} \, dx}{b}\\ &=-\frac {x}{b}+\frac {\sqrt [3]{a} \int \frac {1}{\sqrt [3]{a}-\sqrt [3]{b} x} \, dx}{3 b}+\frac {\sqrt [3]{a} \int \frac {2 \sqrt [3]{a}+\sqrt [3]{b} x}{a^{2/3}+\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3} x^2} \, dx}{3 b}\\ &=-\frac {x}{b}-\frac {\sqrt [3]{a} \log \left (\sqrt [3]{a}-\sqrt [3]{b} x\right )}{3 b^{4/3}}+\frac {\sqrt [3]{a} \int \frac {\sqrt [3]{a} \sqrt [3]{b}+2 b^{2/3} x}{a^{2/3}+\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3} x^2} \, dx}{6 b^{4/3}}+\frac {a^{2/3} \int \frac {1}{a^{2/3}+\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3} x^2} \, dx}{2 b}\\ &=-\frac {x}{b}-\frac {\sqrt [3]{a} \log \left (\sqrt [3]{a}-\sqrt [3]{b} x\right )}{3 b^{4/3}}+\frac {\sqrt [3]{a} \log \left (a^{2/3}+\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3} x^2\right )}{6 b^{4/3}}-\frac {\sqrt [3]{a} \operatorname {Subst}\left (\int \frac {1}{-3-x^2} \, dx,x,1+\frac {2 \sqrt [3]{b} x}{\sqrt [3]{a}}\right )}{b^{4/3}}\\ &=-\frac {x}{b}+\frac {\sqrt [3]{a} \tan ^{-1}\left (\frac {\sqrt [3]{a}+2 \sqrt [3]{b} x}{\sqrt {3} \sqrt [3]{a}}\right )}{\sqrt {3} b^{4/3}}-\frac {\sqrt [3]{a} \log \left (\sqrt [3]{a}-\sqrt [3]{b} x\right )}{3 b^{4/3}}+\frac {\sqrt [3]{a} \log \left (a^{2/3}+\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3} x^2\right )}{6 b^{4/3}}\\ \end {align*}
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Mathematica [A] time = 0.02, size = 108, normalized size = 0.90 \[ \frac {\sqrt [3]{a} \log \left (a^{2/3}+\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3} x^2\right )-2 \sqrt [3]{a} \log \left (\sqrt [3]{a}-\sqrt [3]{b} x\right )+2 \sqrt {3} \sqrt [3]{a} \tan ^{-1}\left (\frac {\frac {2 \sqrt [3]{b} x}{\sqrt [3]{a}}+1}{\sqrt {3}}\right )-6 \sqrt [3]{b} x}{6 b^{4/3}} \]
Antiderivative was successfully verified.
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fricas [A] time = 0.70, size = 103, normalized size = 0.86 \[ -\frac {2 \, \sqrt {3} \left (-\frac {a}{b}\right )^{\frac {1}{3}} \arctan \left (\frac {2 \, \sqrt {3} b x \left (-\frac {a}{b}\right )^{\frac {2}{3}} + \sqrt {3} a}{3 \, a}\right ) + \left (-\frac {a}{b}\right )^{\frac {1}{3}} \log \left (x^{2} - x \left (-\frac {a}{b}\right )^{\frac {1}{3}} + \left (-\frac {a}{b}\right )^{\frac {2}{3}}\right ) - 2 \, \left (-\frac {a}{b}\right )^{\frac {1}{3}} \log \left (x + \left (-\frac {a}{b}\right )^{\frac {1}{3}}\right ) + 6 \, x}{6 \, b} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 0.17, size = 104, normalized size = 0.87 \[ -\frac {\left (\frac {a}{b}\right )^{\frac {1}{3}} \log \left ({\left | x - \left (\frac {a}{b}\right )^{\frac {1}{3}} \right |}\right )}{3 \, b} - \frac {x}{b} + \frac {\sqrt {3} \left (a b^{2}\right )^{\frac {1}{3}} \arctan \left (\frac {\sqrt {3} {\left (2 \, x + \left (\frac {a}{b}\right )^{\frac {1}{3}}\right )}}{3 \, \left (\frac {a}{b}\right )^{\frac {1}{3}}}\right )}{3 \, b^{2}} + \frac {\left (a b^{2}\right )^{\frac {1}{3}} \log \left (x^{2} + x \left (\frac {a}{b}\right )^{\frac {1}{3}} + \left (\frac {a}{b}\right )^{\frac {2}{3}}\right )}{6 \, b^{2}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.00, size = 101, normalized size = 0.84 \[ \frac {\sqrt {3}\, a \arctan \left (\frac {\sqrt {3}\, \left (\frac {2 x}{\left (\frac {a}{b}\right )^{\frac {1}{3}}}+1\right )}{3}\right )}{3 \left (\frac {a}{b}\right )^{\frac {2}{3}} b^{2}}-\frac {a \ln \left (x -\left (\frac {a}{b}\right )^{\frac {1}{3}}\right )}{3 \left (\frac {a}{b}\right )^{\frac {2}{3}} b^{2}}+\frac {a \ln \left (x^{2}+\left (\frac {a}{b}\right )^{\frac {1}{3}} x +\left (\frac {a}{b}\right )^{\frac {2}{3}}\right )}{6 \left (\frac {a}{b}\right )^{\frac {2}{3}} b^{2}}-\frac {x}{b} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 3.02, size = 106, normalized size = 0.88 \[ -\frac {x}{b} + \frac {\sqrt {3} a \arctan \left (\frac {\sqrt {3} {\left (2 \, x + \left (\frac {a}{b}\right )^{\frac {1}{3}}\right )}}{3 \, \left (\frac {a}{b}\right )^{\frac {1}{3}}}\right )}{3 \, b^{2} \left (\frac {a}{b}\right )^{\frac {2}{3}}} + \frac {a \log \left (x^{2} + x \left (\frac {a}{b}\right )^{\frac {1}{3}} + \left (\frac {a}{b}\right )^{\frac {2}{3}}\right )}{6 \, b^{2} \left (\frac {a}{b}\right )^{\frac {2}{3}}} - \frac {a \log \left (x - \left (\frac {a}{b}\right )^{\frac {1}{3}}\right )}{3 \, b^{2} \left (\frac {a}{b}\right )^{\frac {2}{3}}} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 1.12, size = 116, normalized size = 0.97 \[ \frac {{\left (-a\right )}^{1/3}\,\ln \left ({\left (-a\right )}^{4/3}-a\,b^{1/3}\,x\right )}{3\,b^{4/3}}-\frac {x}{b}-\frac {{\left (-a\right )}^{1/3}\,\ln \left (3\,{\left (-a\right )}^{4/3}\,b^{2/3}\,\left (\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )+3\,a\,b\,x\right )\,\left (\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )}{3\,b^{4/3}}+\frac {{\left (-a\right )}^{1/3}\,\ln \left (9\,{\left (-a\right )}^{4/3}\,b^{2/3}\,\left (-\frac {1}{6}+\frac {\sqrt {3}\,1{}\mathrm {i}}{6}\right )-3\,a\,b\,x\right )\,\left (-\frac {1}{6}+\frac {\sqrt {3}\,1{}\mathrm {i}}{6}\right )}{b^{4/3}} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [A] time = 0.24, size = 24, normalized size = 0.20 \[ - \operatorname {RootSum} {\left (27 t^{3} b^{4} - a, \left (t \mapsto t \log {\left (- 3 t b + x \right )} \right )\right )} - \frac {x}{b} \]
Verification of antiderivative is not currently implemented for this CAS.
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