Integrand size = 17, antiderivative size = 65 \[ \int \frac {x^{13}}{\left (b x^2+c x^4\right )^3} \, dx=\frac {x^2}{2 c^3}+\frac {b^3}{4 c^4 \left (b+c x^2\right )^2}-\frac {3 b^2}{2 c^4 \left (b+c x^2\right )}-\frac {3 b \log \left (b+c x^2\right )}{2 c^4} \]
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Time = 0.04 (sec) , antiderivative size = 65, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.176, Rules used = {1598, 272, 45} \[ \int \frac {x^{13}}{\left (b x^2+c x^4\right )^3} \, dx=\frac {b^3}{4 c^4 \left (b+c x^2\right )^2}-\frac {3 b^2}{2 c^4 \left (b+c x^2\right )}-\frac {3 b \log \left (b+c x^2\right )}{2 c^4}+\frac {x^2}{2 c^3} \]
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Rule 45
Rule 272
Rule 1598
Rubi steps \begin{align*} \text {integral}& = \int \frac {x^7}{\left (b+c x^2\right )^3} \, dx \\ & = \frac {1}{2} \text {Subst}\left (\int \frac {x^3}{(b+c x)^3} \, dx,x,x^2\right ) \\ & = \frac {1}{2} \text {Subst}\left (\int \left (\frac {1}{c^3}-\frac {b^3}{c^3 (b+c x)^3}+\frac {3 b^2}{c^3 (b+c x)^2}-\frac {3 b}{c^3 (b+c x)}\right ) \, dx,x,x^2\right ) \\ & = \frac {x^2}{2 c^3}+\frac {b^3}{4 c^4 \left (b+c x^2\right )^2}-\frac {3 b^2}{2 c^4 \left (b+c x^2\right )}-\frac {3 b \log \left (b+c x^2\right )}{2 c^4} \\ \end{align*}
Time = 0.05 (sec) , antiderivative size = 48, normalized size of antiderivative = 0.74 \[ \int \frac {x^{13}}{\left (b x^2+c x^4\right )^3} \, dx=-\frac {-2 c x^2+\frac {b^2 \left (5 b+6 c x^2\right )}{\left (b+c x^2\right )^2}+6 b \log \left (b+c x^2\right )}{4 c^4} \]
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Time = 0.07 (sec) , antiderivative size = 54, normalized size of antiderivative = 0.83
method | result | size |
risch | \(\frac {x^{2}}{2 c^{3}}+\frac {-\frac {3 b^{2} x^{2}}{2}-\frac {5 b^{3}}{4 c}}{c^{3} \left (c \,x^{2}+b \right )^{2}}-\frac {3 b \ln \left (c \,x^{2}+b \right )}{2 c^{4}}\) | \(54\) |
norman | \(\frac {\frac {x^{11}}{2 c}-\frac {3 b^{2} x^{7}}{c^{3}}-\frac {9 b^{3} x^{5}}{4 c^{4}}}{x^{5} \left (c \,x^{2}+b \right )^{2}}-\frac {3 b \ln \left (c \,x^{2}+b \right )}{2 c^{4}}\) | \(60\) |
default | \(\frac {x^{2}}{2 c^{3}}-\frac {b \left (-\frac {b^{2}}{2 c \left (c \,x^{2}+b \right )^{2}}+\frac {3 \ln \left (c \,x^{2}+b \right )}{c}+\frac {3 b}{c \left (c \,x^{2}+b \right )}\right )}{2 c^{3}}\) | \(62\) |
parallelrisch | \(-\frac {-2 c^{3} x^{6}+6 \ln \left (c \,x^{2}+b \right ) x^{4} b \,c^{2}+12 \ln \left (c \,x^{2}+b \right ) x^{2} b^{2} c +12 b^{2} c \,x^{2}+6 b^{3} \ln \left (c \,x^{2}+b \right )+9 b^{3}}{4 c^{4} \left (c \,x^{2}+b \right )^{2}}\) | \(85\) |
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Time = 0.26 (sec) , antiderivative size = 91, normalized size of antiderivative = 1.40 \[ \int \frac {x^{13}}{\left (b x^2+c x^4\right )^3} \, dx=\frac {2 \, c^{3} x^{6} + 4 \, b c^{2} x^{4} - 4 \, b^{2} c x^{2} - 5 \, b^{3} - 6 \, {\left (b c^{2} x^{4} + 2 \, b^{2} c x^{2} + b^{3}\right )} \log \left (c x^{2} + b\right )}{4 \, {\left (c^{6} x^{4} + 2 \, b c^{5} x^{2} + b^{2} c^{4}\right )}} \]
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Time = 0.19 (sec) , antiderivative size = 68, normalized size of antiderivative = 1.05 \[ \int \frac {x^{13}}{\left (b x^2+c x^4\right )^3} \, dx=- \frac {3 b \log {\left (b + c x^{2} \right )}}{2 c^{4}} + \frac {- 5 b^{3} - 6 b^{2} c x^{2}}{4 b^{2} c^{4} + 8 b c^{5} x^{2} + 4 c^{6} x^{4}} + \frac {x^{2}}{2 c^{3}} \]
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Time = 0.20 (sec) , antiderivative size = 66, normalized size of antiderivative = 1.02 \[ \int \frac {x^{13}}{\left (b x^2+c x^4\right )^3} \, dx=-\frac {6 \, b^{2} c x^{2} + 5 \, b^{3}}{4 \, {\left (c^{6} x^{4} + 2 \, b c^{5} x^{2} + b^{2} c^{4}\right )}} + \frac {x^{2}}{2 \, c^{3}} - \frac {3 \, b \log \left (c x^{2} + b\right )}{2 \, c^{4}} \]
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Time = 0.29 (sec) , antiderivative size = 62, normalized size of antiderivative = 0.95 \[ \int \frac {x^{13}}{\left (b x^2+c x^4\right )^3} \, dx=\frac {x^{2}}{2 \, c^{3}} - \frac {3 \, b \log \left ({\left | c x^{2} + b \right |}\right )}{2 \, c^{4}} + \frac {9 \, b c^{2} x^{4} + 12 \, b^{2} c x^{2} + 4 \, b^{3}}{4 \, {\left (c x^{2} + b\right )}^{2} c^{4}} \]
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Time = 12.89 (sec) , antiderivative size = 68, normalized size of antiderivative = 1.05 \[ \int \frac {x^{13}}{\left (b x^2+c x^4\right )^3} \, dx=\frac {x^2}{2\,c^3}-\frac {\frac {5\,b^3}{4\,c}+\frac {3\,b^2\,x^2}{2}}{b^2\,c^3+2\,b\,c^4\,x^2+c^5\,x^4}-\frac {3\,b\,\ln \left (c\,x^2+b\right )}{2\,c^4} \]
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