Integrand size = 13, antiderivative size = 21 \[ \int f^{a+\frac {b}{x}} x^3 \, dx=b^4 f^a \Gamma \left (-4,-\frac {b \log (f)}{x}\right ) \log ^4(f) \]
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Time = 0.01 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.00, number of steps used = 1, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.077, Rules used = {2250} \[ \int f^{a+\frac {b}{x}} x^3 \, dx=b^4 f^a \log ^4(f) \Gamma \left (-4,-\frac {b \log (f)}{x}\right ) \]
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Rule 2250
Rubi steps \begin{align*} \text {integral}& = b^4 f^a \Gamma \left (-4,-\frac {b \log (f)}{x}\right ) \log ^4(f) \\ \end{align*}
Time = 0.00 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.00 \[ \int f^{a+\frac {b}{x}} x^3 \, dx=b^4 f^a \Gamma \left (-4,-\frac {b \log (f)}{x}\right ) \log ^4(f) \]
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Leaf count of result is larger than twice the leaf count of optimal. \(98\) vs. \(2(17)=34\).
Time = 0.07 (sec) , antiderivative size = 99, normalized size of antiderivative = 4.71
method | result | size |
risch | \(\frac {f^{a} \operatorname {Ei}_{1}\left (-\frac {b \ln \left (f \right )}{x}\right ) b^{4} \ln \left (f \right )^{4}}{24}+\frac {f^{a} f^{\frac {b}{x}} x \,b^{3} \ln \left (f \right )^{3}}{24}+\frac {f^{a} f^{\frac {b}{x}} x^{2} b^{2} \ln \left (f \right )^{2}}{24}+\frac {f^{a} f^{\frac {b}{x}} x^{3} b \ln \left (f \right )}{12}+\frac {f^{a} f^{\frac {b}{x}} x^{4}}{4}\) | \(99\) |
meijerg | \(-f^{a} \ln \left (f \right )^{4} b^{4} \left (-\frac {x^{4}}{4 b^{4} \ln \left (f \right )^{4}}-\frac {x^{3}}{3 b^{3} \ln \left (f \right )^{3}}-\frac {x^{2}}{4 b^{2} \ln \left (f \right )^{2}}-\frac {x}{6 b \ln \left (f \right )}-\frac {25}{288}-\frac {\ln \left (x \right )}{24}+\frac {\ln \left (-b \right )}{24}+\frac {\ln \left (\ln \left (f \right )\right )}{24}+\frac {x^{4} \left (\frac {125 b^{4} \ln \left (f \right )^{4}}{x^{4}}+\frac {240 b^{3} \ln \left (f \right )^{3}}{x^{3}}+\frac {360 b^{2} \ln \left (f \right )^{2}}{x^{2}}+\frac {480 b \ln \left (f \right )}{x}+360\right )}{1440 b^{4} \ln \left (f \right )^{4}}-\frac {x^{4} \left (\frac {5 b^{3} \ln \left (f \right )^{3}}{x^{3}}+\frac {5 b^{2} \ln \left (f \right )^{2}}{x^{2}}+\frac {10 b \ln \left (f \right )}{x}+30\right ) {\mathrm e}^{\frac {b \ln \left (f \right )}{x}}}{120 b^{4} \ln \left (f \right )^{4}}-\frac {\ln \left (-\frac {b \ln \left (f \right )}{x}\right )}{24}-\frac {\operatorname {Ei}_{1}\left (-\frac {b \ln \left (f \right )}{x}\right )}{24}\right )\) | \(211\) |
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Leaf count of result is larger than twice the leaf count of optimal. 68 vs. \(2 (17) = 34\).
Time = 0.27 (sec) , antiderivative size = 68, normalized size of antiderivative = 3.24 \[ \int f^{a+\frac {b}{x}} x^3 \, dx=-\frac {1}{24} \, b^{4} f^{a} {\rm Ei}\left (\frac {b \log \left (f\right )}{x}\right ) \log \left (f\right )^{4} + \frac {1}{24} \, {\left (b^{3} x \log \left (f\right )^{3} + b^{2} x^{2} \log \left (f\right )^{2} + 2 \, b x^{3} \log \left (f\right ) + 6 \, x^{4}\right )} f^{\frac {a x + b}{x}} \]
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\[ \int f^{a+\frac {b}{x}} x^3 \, dx=\int f^{a + \frac {b}{x}} x^{3}\, dx \]
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none
Time = 0.22 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.00 \[ \int f^{a+\frac {b}{x}} x^3 \, dx=b^{4} f^{a} \Gamma \left (-4, -\frac {b \log \left (f\right )}{x}\right ) \log \left (f\right )^{4} \]
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\[ \int f^{a+\frac {b}{x}} x^3 \, dx=\int { f^{a + \frac {b}{x}} x^{3} \,d x } \]
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Time = 0.23 (sec) , antiderivative size = 87, normalized size of antiderivative = 4.14 \[ \int f^{a+\frac {b}{x}} x^3 \, dx=\frac {b^4\,f^a\,{\ln \left (f\right )}^4\,\mathrm {expint}\left (-\frac {b\,\ln \left (f\right )}{x}\right )}{24}+b^4\,f^a\,f^{b/x}\,{\ln \left (f\right )}^4\,\left (\frac {x^2}{24\,b^2\,{\ln \left (f\right )}^2}+\frac {x^3}{12\,b^3\,{\ln \left (f\right )}^3}+\frac {x^4}{4\,b^4\,{\ln \left (f\right )}^4}+\frac {x}{24\,b\,\ln \left (f\right )}\right ) \]
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