Integrand size = 17, antiderivative size = 40 \[ \int \frac {x^7}{b x^2+c x^4} \, dx=-\frac {b x^2}{2 c^2}+\frac {x^4}{4 c}+\frac {b^2 \log \left (b+c x^2\right )}{2 c^3} \]
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Time = 0.02 (sec) , antiderivative size = 40, 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} \[ \int \frac {x^7}{b x^2+c x^4} \, dx=\frac {b^2 \log \left (b+c x^2\right )}{2 c^3}-\frac {b x^2}{2 c^2}+\frac {x^4}{4 c} \]
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Rule 45
Rule 272
Rule 1598
Rubi steps \begin{align*} \text {integral}& = \int \frac {x^5}{b+c x^2} \, dx \\ & = \frac {1}{2} \text {Subst}\left (\int \frac {x^2}{b+c x} \, dx,x,x^2\right ) \\ & = \frac {1}{2} \text {Subst}\left (\int \left (-\frac {b}{c^2}+\frac {x}{c}+\frac {b^2}{c^2 (b+c x)}\right ) \, dx,x,x^2\right ) \\ & = -\frac {b x^2}{2 c^2}+\frac {x^4}{4 c}+\frac {b^2 \log \left (b+c x^2\right )}{2 c^3} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 40, normalized size of antiderivative = 1.00 \[ \int \frac {x^7}{b x^2+c x^4} \, dx=-\frac {b x^2}{2 c^2}+\frac {x^4}{4 c}+\frac {b^2 \log \left (b+c x^2\right )}{2 c^3} \]
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Time = 0.08 (sec) , antiderivative size = 34, normalized size of antiderivative = 0.85
method | result | size |
parallelrisch | \(\frac {c^{2} x^{4}-2 b c \,x^{2}+2 b^{2} \ln \left (c \,x^{2}+b \right )}{4 c^{3}}\) | \(34\) |
default | \(-\frac {-\frac {1}{2} c \,x^{4}+b \,x^{2}}{2 c^{2}}+\frac {b^{2} \ln \left (c \,x^{2}+b \right )}{2 c^{3}}\) | \(35\) |
norman | \(\frac {\frac {x^{5}}{4 c}-\frac {b \,x^{3}}{2 c^{2}}}{x}+\frac {b^{2} \ln \left (c \,x^{2}+b \right )}{2 c^{3}}\) | \(40\) |
risch | \(\frac {x^{4}}{4 c}-\frac {b \,x^{2}}{2 c^{2}}+\frac {b^{2}}{4 c^{3}}+\frac {b^{2} \ln \left (c \,x^{2}+b \right )}{2 c^{3}}\) | \(43\) |
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none
Time = 0.25 (sec) , antiderivative size = 33, normalized size of antiderivative = 0.82 \[ \int \frac {x^7}{b x^2+c x^4} \, dx=\frac {c^{2} x^{4} - 2 \, b c x^{2} + 2 \, b^{2} \log \left (c x^{2} + b\right )}{4 \, c^{3}} \]
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Time = 0.07 (sec) , antiderivative size = 32, normalized size of antiderivative = 0.80 \[ \int \frac {x^7}{b x^2+c x^4} \, dx=\frac {b^{2} \log {\left (b + c x^{2} \right )}}{2 c^{3}} - \frac {b x^{2}}{2 c^{2}} + \frac {x^{4}}{4 c} \]
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none
Time = 0.18 (sec) , antiderivative size = 34, normalized size of antiderivative = 0.85 \[ \int \frac {x^7}{b x^2+c x^4} \, dx=\frac {b^{2} \log \left (c x^{2} + b\right )}{2 \, c^{3}} + \frac {c x^{4} - 2 \, b x^{2}}{4 \, c^{2}} \]
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none
Time = 0.28 (sec) , antiderivative size = 35, normalized size of antiderivative = 0.88 \[ \int \frac {x^7}{b x^2+c x^4} \, dx=\frac {b^{2} \log \left ({\left | c x^{2} + b \right |}\right )}{2 \, c^{3}} + \frac {c x^{4} - 2 \, b x^{2}}{4 \, c^{2}} \]
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Time = 0.05 (sec) , antiderivative size = 33, normalized size of antiderivative = 0.82 \[ \int \frac {x^7}{b x^2+c x^4} \, dx=\frac {2\,b^2\,\ln \left (c\,x^2+b\right )+c^2\,x^4-2\,b\,c\,x^2}{4\,c^3} \]
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