Optimal. Leaf size=38 \[ \frac {1}{3 b \left (b+a x^3\right )}+\frac {\log (x)}{b^2}-\frac {\log \left (b+a x^3\right )}{3 b^2} \]
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Rubi [A]
time = 0.02, antiderivative size = 38, normalized size of antiderivative = 1.00, number of steps
used = 4, number of rules used = 3, integrand size = 13, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.231, Rules used = {269, 272, 46}
\begin {gather*} -\frac {\log \left (a x^3+b\right )}{3 b^2}+\frac {1}{3 b \left (a x^3+b\right )}+\frac {\log (x)}{b^2} \end {gather*}
Antiderivative was successfully verified.
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Rule 46
Rule 269
Rule 272
Rubi steps
\begin {align*} \int \frac {1}{\left (a+\frac {b}{x^3}\right )^2 x^7} \, dx &=\int \frac {1}{x \left (b+a x^3\right )^2} \, dx\\ &=\frac {1}{3} \text {Subst}\left (\int \frac {1}{x (b+a x)^2} \, dx,x,x^3\right )\\ &=\frac {1}{3} \text {Subst}\left (\int \left (\frac {1}{b^2 x}-\frac {a}{b (b+a x)^2}-\frac {a}{b^2 (b+a x)}\right ) \, dx,x,x^3\right )\\ &=\frac {1}{3 b \left (b+a x^3\right )}+\frac {\log (x)}{b^2}-\frac {\log \left (b+a x^3\right )}{3 b^2}\\ \end {align*}
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Mathematica [A]
time = 0.01, size = 33, normalized size = 0.87 \begin {gather*} \frac {\frac {b}{b+a x^3}+3 \log (x)-\log \left (b+a x^3\right )}{3 b^2} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.04, size = 42, normalized size = 1.11
method | result | size |
risch | \(\frac {1}{3 b \left (a \,x^{3}+b \right )}+\frac {\ln \left (x \right )}{b^{2}}-\frac {\ln \left (a \,x^{3}+b \right )}{3 b^{2}}\) | \(35\) |
norman | \(-\frac {a \,x^{3}}{3 b^{2} \left (a \,x^{3}+b \right )}+\frac {\ln \left (x \right )}{b^{2}}-\frac {\ln \left (a \,x^{3}+b \right )}{3 b^{2}}\) | \(39\) |
default | \(-\frac {a \left (-\frac {b}{a \left (a \,x^{3}+b \right )}+\frac {\ln \left (a \,x^{3}+b \right )}{a}\right )}{3 b^{2}}+\frac {\ln \left (x \right )}{b^{2}}\) | \(42\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.31, size = 37, normalized size = 0.97 \begin {gather*} \frac {1}{3 \, {\left (a b x^{3} + b^{2}\right )}} - \frac {\log \left (a x^{3} + b\right )}{3 \, b^{2}} + \frac {\log \left (x^{3}\right )}{3 \, b^{2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.36, size = 47, normalized size = 1.24 \begin {gather*} -\frac {{\left (a x^{3} + b\right )} \log \left (a x^{3} + b\right ) - 3 \, {\left (a x^{3} + b\right )} \log \left (x\right ) - b}{3 \, {\left (a b^{2} x^{3} + b^{3}\right )}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A]
time = 0.17, size = 34, normalized size = 0.89 \begin {gather*} \frac {1}{3 a b x^{3} + 3 b^{2}} + \frac {\log {\left (x \right )}}{b^{2}} - \frac {\log {\left (x^{3} + \frac {b}{a} \right )}}{3 b^{2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 1.06, size = 45, normalized size = 1.18 \begin {gather*} -\frac {\log \left ({\left | a x^{3} + b \right |}\right )}{3 \, b^{2}} + \frac {\log \left ({\left | x \right |}\right )}{b^{2}} + \frac {a x^{3} + 2 \, b}{3 \, {\left (a x^{3} + b\right )} b^{2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.07, size = 34, normalized size = 0.89 \begin {gather*} \frac {\ln \left (x\right )}{b^2}+\frac {1}{3\,b\,\left (a\,x^3+b\right )}-\frac {\ln \left (a\,x^3+b\right )}{3\,b^2} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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