Optimal. Leaf size=56 \[ -\frac {b^3 \log (x)}{a^4}+\frac {b^3 \log (a+b x)}{a^4}-\frac {b^2}{a^3 x}+\frac {b}{2 a^2 x^2}-\frac {1}{3 a x^3} \]
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Rubi [A] time = 0.02, antiderivative size = 56, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 1, integrand size = 11, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.091, Rules used = {44} \begin {gather*} -\frac {b^2}{a^3 x}-\frac {b^3 \log (x)}{a^4}+\frac {b^3 \log (a+b x)}{a^4}+\frac {b}{2 a^2 x^2}-\frac {1}{3 a x^3} \end {gather*}
Antiderivative was successfully verified.
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Rule 44
Rubi steps
\begin {align*} \int \frac {1}{x^4 (a+b x)} \, dx &=\int \left (\frac {1}{a x^4}-\frac {b}{a^2 x^3}+\frac {b^2}{a^3 x^2}-\frac {b^3}{a^4 x}+\frac {b^4}{a^4 (a+b x)}\right ) \, dx\\ &=-\frac {1}{3 a x^3}+\frac {b}{2 a^2 x^2}-\frac {b^2}{a^3 x}-\frac {b^3 \log (x)}{a^4}+\frac {b^3 \log (a+b x)}{a^4}\\ \end {align*}
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Mathematica [A] time = 0.01, size = 56, normalized size = 1.00 \begin {gather*} -\frac {b^3 \log (x)}{a^4}+\frac {b^3 \log (a+b x)}{a^4}-\frac {b^2}{a^3 x}+\frac {b}{2 a^2 x^2}-\frac {1}{3 a x^3} \end {gather*}
Antiderivative was successfully verified.
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IntegrateAlgebraic [F] time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {1}{x^4 (a+b x)} \, dx \end {gather*}
Verification is not applicable to the result.
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fricas [A] time = 1.22, size = 54, normalized size = 0.96 \begin {gather*} \frac {6 \, b^{3} x^{3} \log \left (b x + a\right ) - 6 \, b^{3} x^{3} \log \relax (x) - 6 \, a b^{2} x^{2} + 3 \, a^{2} b x - 2 \, a^{3}}{6 \, a^{4} x^{3}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 1.07, size = 56, normalized size = 1.00 \begin {gather*} \frac {b^{3} \log \left ({\left | b x + a \right |}\right )}{a^{4}} - \frac {b^{3} \log \left ({\left | x \right |}\right )}{a^{4}} - \frac {6 \, a b^{2} x^{2} - 3 \, a^{2} b x + 2 \, a^{3}}{6 \, a^{4} x^{3}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.01, size = 53, normalized size = 0.95 \begin {gather*} -\frac {b^{3} \ln \relax (x )}{a^{4}}+\frac {b^{3} \ln \left (b x +a \right )}{a^{4}}-\frac {b^{2}}{a^{3} x}+\frac {b}{2 a^{2} x^{2}}-\frac {1}{3 a \,x^{3}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 1.35, size = 51, normalized size = 0.91 \begin {gather*} \frac {b^{3} \log \left (b x + a\right )}{a^{4}} - \frac {b^{3} \log \relax (x)}{a^{4}} - \frac {6 \, b^{2} x^{2} - 3 \, a b x + 2 \, a^{2}}{6 \, a^{3} x^{3}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 0.10, size = 48, normalized size = 0.86 \begin {gather*} \frac {2\,b^3\,\mathrm {atanh}\left (\frac {2\,b\,x}{a}+1\right )}{a^4}-\frac {\frac {a^3}{3}-\frac {a^2\,b\,x}{2}+a\,b^2\,x^2}{a^4\,x^3} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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sympy [A] time = 0.24, size = 44, normalized size = 0.79 \begin {gather*} \frac {- 2 a^{2} + 3 a b x - 6 b^{2} x^{2}}{6 a^{3} x^{3}} + \frac {b^{3} \left (- \log {\relax (x )} + \log {\left (\frac {a}{b} + x \right )}\right )}{a^{4}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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