Integrand size = 15, antiderivative size = 46 \[ \int \frac {x^{-m}}{a^3+x^3} \, dx=\frac {x^{1-m} \operatorname {Hypergeometric2F1}\left (1,\frac {1-m}{3},\frac {4-m}{3},-\frac {x^3}{a^3}\right )}{a^3 (1-m)} \]
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Time = 0.01 (sec) , antiderivative size = 46, normalized size of antiderivative = 1.00, number of steps used = 1, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.067, Rules used = {371} \[ \int \frac {x^{-m}}{a^3+x^3} \, dx=\frac {x^{1-m} \operatorname {Hypergeometric2F1}\left (1,\frac {1-m}{3},\frac {4-m}{3},-\frac {x^3}{a^3}\right )}{a^3 (1-m)} \]
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Rule 371
Rubi steps \begin{align*} \text {integral}& = \frac {x^{1-m} \operatorname {Hypergeometric2F1}\left (1,\frac {1-m}{3},\frac {4-m}{3},-\frac {x^3}{a^3}\right )}{a^3 (1-m)} \\ \end{align*}
Time = 0.14 (sec) , antiderivative size = 45, normalized size of antiderivative = 0.98 \[ \int \frac {x^{-m}}{a^3+x^3} \, dx=-\frac {x^{1-m} \operatorname {Hypergeometric2F1}\left (1,\frac {1}{3}-\frac {m}{3},\frac {4}{3}-\frac {m}{3},-\frac {x^3}{a^3}\right )}{a^3 (-1+m)} \]
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\[\int \frac {x^{-m}}{a^{3}+x^{3}}d x\]
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\[ \int \frac {x^{-m}}{a^3+x^3} \, dx=\int { \frac {1}{{\left (a^{3} + x^{3}\right )} x^{m}} \,d x } \]
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Result contains complex when optimal does not.
Time = 1.23 (sec) , antiderivative size = 92, normalized size of antiderivative = 2.00 \[ \int \frac {x^{-m}}{a^3+x^3} \, dx=- \frac {m x^{1 - m} \Phi \left (\frac {x^{3} e^{i \pi }}{a^{3}}, 1, \frac {1}{3} - \frac {m}{3}\right ) \Gamma \left (\frac {1}{3} - \frac {m}{3}\right )}{9 a^{3} \Gamma \left (\frac {4}{3} - \frac {m}{3}\right )} + \frac {x^{1 - m} \Phi \left (\frac {x^{3} e^{i \pi }}{a^{3}}, 1, \frac {1}{3} - \frac {m}{3}\right ) \Gamma \left (\frac {1}{3} - \frac {m}{3}\right )}{9 a^{3} \Gamma \left (\frac {4}{3} - \frac {m}{3}\right )} \]
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\[ \int \frac {x^{-m}}{a^3+x^3} \, dx=\int { \frac {1}{{\left (a^{3} + x^{3}\right )} x^{m}} \,d x } \]
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\[ \int \frac {x^{-m}}{a^3+x^3} \, dx=\int { \frac {1}{{\left (a^{3} + x^{3}\right )} x^{m}} \,d x } \]
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Timed out. \[ \int \frac {x^{-m}}{a^3+x^3} \, dx=\int \frac {1}{x^m\,\left (a^3+x^3\right )} \,d x \]
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