Integrand size = 16, antiderivative size = 105 \[ \int \frac {x^2}{\left (a+b \log \left (c x^n\right )\right )^3} \, dx=\frac {9 e^{-\frac {3 a}{b n}} x^3 \left (c x^n\right )^{-3/n} \operatorname {ExpIntegralEi}\left (\frac {3 \left (a+b \log \left (c x^n\right )\right )}{b n}\right )}{2 b^3 n^3}-\frac {x^3}{2 b n \left (a+b \log \left (c x^n\right )\right )^2}-\frac {3 x^3}{2 b^2 n^2 \left (a+b \log \left (c x^n\right )\right )} \]
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Time = 0.07 (sec) , antiderivative size = 105, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.188, Rules used = {2343, 2347, 2209} \[ \int \frac {x^2}{\left (a+b \log \left (c x^n\right )\right )^3} \, dx=\frac {9 x^3 e^{-\frac {3 a}{b n}} \left (c x^n\right )^{-3/n} \operatorname {ExpIntegralEi}\left (\frac {3 \left (a+b \log \left (c x^n\right )\right )}{b n}\right )}{2 b^3 n^3}-\frac {3 x^3}{2 b^2 n^2 \left (a+b \log \left (c x^n\right )\right )}-\frac {x^3}{2 b n \left (a+b \log \left (c x^n\right )\right )^2} \]
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Rule 2209
Rule 2343
Rule 2347
Rubi steps \begin{align*} \text {integral}& = -\frac {x^3}{2 b n \left (a+b \log \left (c x^n\right )\right )^2}+\frac {3 \int \frac {x^2}{\left (a+b \log \left (c x^n\right )\right )^2} \, dx}{2 b n} \\ & = -\frac {x^3}{2 b n \left (a+b \log \left (c x^n\right )\right )^2}-\frac {3 x^3}{2 b^2 n^2 \left (a+b \log \left (c x^n\right )\right )}+\frac {9 \int \frac {x^2}{a+b \log \left (c x^n\right )} \, dx}{2 b^2 n^2} \\ & = -\frac {x^3}{2 b n \left (a+b \log \left (c x^n\right )\right )^2}-\frac {3 x^3}{2 b^2 n^2 \left (a+b \log \left (c x^n\right )\right )}+\frac {\left (9 x^3 \left (c x^n\right )^{-3/n}\right ) \text {Subst}\left (\int \frac {e^{\frac {3 x}{n}}}{a+b x} \, dx,x,\log \left (c x^n\right )\right )}{2 b^2 n^3} \\ & = \frac {9 e^{-\frac {3 a}{b n}} x^3 \left (c x^n\right )^{-3/n} \text {Ei}\left (\frac {3 \left (a+b \log \left (c x^n\right )\right )}{b n}\right )}{2 b^3 n^3}-\frac {x^3}{2 b n \left (a+b \log \left (c x^n\right )\right )^2}-\frac {3 x^3}{2 b^2 n^2 \left (a+b \log \left (c x^n\right )\right )} \\ \end{align*}
Time = 0.10 (sec) , antiderivative size = 89, normalized size of antiderivative = 0.85 \[ \int \frac {x^2}{\left (a+b \log \left (c x^n\right )\right )^3} \, dx=\frac {x^3 \left (9 e^{-\frac {3 a}{b n}} \left (c x^n\right )^{-3/n} \operatorname {ExpIntegralEi}\left (\frac {3 \left (a+b \log \left (c x^n\right )\right )}{b n}\right )-\frac {b n \left (3 a+b n+3 b \log \left (c x^n\right )\right )}{\left (a+b \log \left (c x^n\right )\right )^2}\right )}{2 b^3 n^3} \]
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Result contains higher order function than in optimal. Order 9 vs. order 4.
Time = 0.36 (sec) , antiderivative size = 477, normalized size of antiderivative = 4.54
method | result | size |
risch | \(-\frac {2 b n \,x^{3}-3 i \pi b \,x^{3} \operatorname {csgn}\left (i c \right ) \operatorname {csgn}\left (i x^{n}\right ) \operatorname {csgn}\left (i c \,x^{n}\right )+3 i \pi b \,x^{3} \operatorname {csgn}\left (i c \right ) \operatorname {csgn}\left (i c \,x^{n}\right )^{2}+3 i \pi b \,x^{3} \operatorname {csgn}\left (i x^{n}\right ) \operatorname {csgn}\left (i c \,x^{n}\right )^{2}-3 i \pi b \,x^{3} \operatorname {csgn}\left (i c \,x^{n}\right )^{3}+6 \ln \left (c \right ) b \,x^{3}+6 b \,x^{3} \ln \left (x^{n}\right )+6 x^{3} a}{{\left (-i b \pi \,\operatorname {csgn}\left (i c \right ) \operatorname {csgn}\left (i x^{n}\right ) \operatorname {csgn}\left (i c \,x^{n}\right )+i b \pi \,\operatorname {csgn}\left (i c \right ) \operatorname {csgn}\left (i c \,x^{n}\right )^{2}+i b \pi \,\operatorname {csgn}\left (i x^{n}\right ) \operatorname {csgn}\left (i c \,x^{n}\right )^{2}-i b \pi \operatorname {csgn}\left (i c \,x^{n}\right )^{3}+2 b \ln \left (c \right )+2 \ln \left (x^{n}\right ) b +2 a \right )}^{2} b^{2} n^{2}}-\frac {9 x^{3} c^{-\frac {3}{n}} \left (x^{n}\right )^{-\frac {3}{n}} {\mathrm e}^{-\frac {3 \left (-i b \pi \,\operatorname {csgn}\left (i c \right ) \operatorname {csgn}\left (i x^{n}\right ) \operatorname {csgn}\left (i c \,x^{n}\right )+i b \pi \,\operatorname {csgn}\left (i c \right ) \operatorname {csgn}\left (i c \,x^{n}\right )^{2}+i b \pi \,\operatorname {csgn}\left (i x^{n}\right ) \operatorname {csgn}\left (i c \,x^{n}\right )^{2}-i b \pi \operatorname {csgn}\left (i c \,x^{n}\right )^{3}+2 a \right )}{2 b n}} \operatorname {Ei}_{1}\left (-3 \ln \left (x \right )-\frac {3 \left (-i b \pi \,\operatorname {csgn}\left (i c \right ) \operatorname {csgn}\left (i x^{n}\right ) \operatorname {csgn}\left (i c \,x^{n}\right )+i b \pi \,\operatorname {csgn}\left (i c \right ) \operatorname {csgn}\left (i c \,x^{n}\right )^{2}+i b \pi \,\operatorname {csgn}\left (i x^{n}\right ) \operatorname {csgn}\left (i c \,x^{n}\right )^{2}-i b \pi \operatorname {csgn}\left (i c \,x^{n}\right )^{3}+2 b \ln \left (c \right )+2 b \left (\ln \left (x^{n}\right )-n \ln \left (x \right )\right )+2 a \right )}{2 b n}\right )}{2 b^{3} n^{3}}\) | \(477\) |
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Leaf count of result is larger than twice the leaf count of optimal. 211 vs. \(2 (100) = 200\).
Time = 0.30 (sec) , antiderivative size = 211, normalized size of antiderivative = 2.01 \[ \int \frac {x^2}{\left (a+b \log \left (c x^n\right )\right )^3} \, dx=-\frac {{\left ({\left (3 \, b^{2} n^{2} x^{3} \log \left (x\right ) + 3 \, b^{2} n x^{3} \log \left (c\right ) + {\left (b^{2} n^{2} + 3 \, a b n\right )} x^{3}\right )} e^{\left (\frac {3 \, {\left (b \log \left (c\right ) + a\right )}}{b n}\right )} - 9 \, {\left (b^{2} n^{2} \log \left (x\right )^{2} + b^{2} \log \left (c\right )^{2} + 2 \, a b \log \left (c\right ) + a^{2} + 2 \, {\left (b^{2} n \log \left (c\right ) + a b n\right )} \log \left (x\right )\right )} \operatorname {log\_integral}\left (x^{3} e^{\left (\frac {3 \, {\left (b \log \left (c\right ) + a\right )}}{b n}\right )}\right )\right )} e^{\left (-\frac {3 \, {\left (b \log \left (c\right ) + a\right )}}{b n}\right )}}{2 \, {\left (b^{5} n^{5} \log \left (x\right )^{2} + b^{5} n^{3} \log \left (c\right )^{2} + 2 \, a b^{4} n^{3} \log \left (c\right ) + a^{2} b^{3} n^{3} + 2 \, {\left (b^{5} n^{4} \log \left (c\right ) + a b^{4} n^{4}\right )} \log \left (x\right )\right )}} \]
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\[ \int \frac {x^2}{\left (a+b \log \left (c x^n\right )\right )^3} \, dx=\int \frac {x^{2}}{\left (a + b \log {\left (c x^{n} \right )}\right )^{3}}\, dx \]
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\[ \int \frac {x^2}{\left (a+b \log \left (c x^n\right )\right )^3} \, dx=\int { \frac {x^{2}}{{\left (b \log \left (c x^{n}\right ) + a\right )}^{3}} \,d x } \]
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Leaf count of result is larger than twice the leaf count of optimal. 1029 vs. \(2 (100) = 200\).
Time = 0.36 (sec) , antiderivative size = 1029, normalized size of antiderivative = 9.80 \[ \int \frac {x^2}{\left (a+b \log \left (c x^n\right )\right )^3} \, dx=\text {Too large to display} \]
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Timed out. \[ \int \frac {x^2}{\left (a+b \log \left (c x^n\right )\right )^3} \, dx=\int \frac {x^2}{{\left (a+b\,\ln \left (c\,x^n\right )\right )}^3} \,d x \]
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