Optimal. Leaf size=35 \[ \frac {1}{3} b f^a \log (f) \text {Ei}\left (b x^3 \log (f)\right )-\frac {f^{a+b x^3}}{3 x^3} \]
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Rubi [A] time = 0.04, antiderivative size = 35, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 13, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.154, Rules used = {2214, 2210} \[ \frac {1}{3} b f^a \log (f) \text {Ei}\left (b x^3 \log (f)\right )-\frac {f^{a+b x^3}}{3 x^3} \]
Antiderivative was successfully verified.
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Rule 2210
Rule 2214
Rubi steps
\begin {align*} \int \frac {f^{a+b x^3}}{x^4} \, dx &=-\frac {f^{a+b x^3}}{3 x^3}+(b \log (f)) \int \frac {f^{a+b x^3}}{x} \, dx\\ &=-\frac {f^{a+b x^3}}{3 x^3}+\frac {1}{3} b f^a \text {Ei}\left (b x^3 \log (f)\right ) \log (f)\\ \end {align*}
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Mathematica [A] time = 0.01, size = 32, normalized size = 0.91 \[ \frac {1}{3} f^a \left (b \log (f) \text {Ei}\left (b x^3 \log (f)\right )-\frac {f^{b x^3}}{x^3}\right ) \]
Antiderivative was successfully verified.
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fricas [A] time = 0.41, size = 35, normalized size = 1.00 \[ \frac {b f^{a} x^{3} {\rm Ei}\left (b x^{3} \log \relax (f)\right ) \log \relax (f) - f^{b x^{3} + a}}{3 \, x^{3}} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [F] time = 0.00, size = 0, normalized size = 0.00 \[ \int \frac {f^{b x^{3} + a}}{x^{4}}\,{d x} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [B] time = 0.05, size = 97, normalized size = 2.77 \[ -\frac {\left (\Ei \left (1, -b \,x^{3} \ln \relax (f )\right )-3 \ln \relax (x )-\ln \left (-b \right )+\ln \left (-b \,x^{3} \ln \relax (f )\right )-\ln \left (\ln \relax (f )\right )+\frac {{\mathrm e}^{b \,x^{3} \ln \relax (f )}}{b \,x^{3} \ln \relax (f )}-\frac {2 b \,x^{3} \ln \relax (f )+2}{2 b \,x^{3} \ln \relax (f )}+\frac {1}{b \,x^{3} \ln \relax (f )}+1\right ) b \,f^{a} \ln \relax (f )}{3} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 1.36, size = 18, normalized size = 0.51 \[ \frac {1}{3} \, b f^{a} \Gamma \left (-1, -b x^{3} \log \relax (f)\right ) \log \relax (f) \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 3.53, size = 32, normalized size = 0.91 \[ -\frac {f^a\,\left (f^{b\,x^3}+b\,x^3\,\ln \relax (f)\,\mathrm {expint}\left (-b\,x^3\,\ln \relax (f)\right )\right )}{3\,x^3} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [F] time = 0.00, size = 0, normalized size = 0.00 \[ \int \frac {f^{a + b x^{3}}}{x^{4}}\, dx \]
Verification of antiderivative is not currently implemented for this CAS.
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