Integrand size = 18, antiderivative size = 33 \[ \int \frac {\left (a+b x^2\right ) \left (A+B x^2\right )}{x^7} \, dx=-\frac {a A}{6 x^6}-\frac {A b+a B}{4 x^4}-\frac {b B}{2 x^2} \]
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Time = 0.02 (sec) , antiderivative size = 33, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.111, Rules used = {457, 77} \[ \int \frac {\left (a+b x^2\right ) \left (A+B x^2\right )}{x^7} \, dx=-\frac {a B+A b}{4 x^4}-\frac {a A}{6 x^6}-\frac {b B}{2 x^2} \]
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Rule 77
Rule 457
Rubi steps \begin{align*} \text {integral}& = \frac {1}{2} \text {Subst}\left (\int \frac {(a+b x) (A+B x)}{x^4} \, dx,x,x^2\right ) \\ & = \frac {1}{2} \text {Subst}\left (\int \left (\frac {a A}{x^4}+\frac {A b+a B}{x^3}+\frac {b B}{x^2}\right ) \, dx,x,x^2\right ) \\ & = -\frac {a A}{6 x^6}-\frac {A b+a B}{4 x^4}-\frac {b B}{2 x^2} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.06 \[ \int \frac {\left (a+b x^2\right ) \left (A+B x^2\right )}{x^7} \, dx=-\frac {a A}{6 x^6}+\frac {-A b-a B}{4 x^4}-\frac {b B}{2 x^2} \]
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Time = 0.03 (sec) , antiderivative size = 28, normalized size of antiderivative = 0.85
method | result | size |
default | \(-\frac {a A}{6 x^{6}}-\frac {b B}{2 x^{2}}-\frac {A b +B a}{4 x^{4}}\) | \(28\) |
norman | \(\frac {-\frac {b B \,x^{4}}{2}+\left (-\frac {A b}{4}-\frac {B a}{4}\right ) x^{2}-\frac {A a}{6}}{x^{6}}\) | \(30\) |
risch | \(\frac {-\frac {b B \,x^{4}}{2}+\left (-\frac {A b}{4}-\frac {B a}{4}\right ) x^{2}-\frac {A a}{6}}{x^{6}}\) | \(30\) |
gosper | \(-\frac {6 b B \,x^{4}+3 A b \,x^{2}+3 B a \,x^{2}+2 A a}{12 x^{6}}\) | \(32\) |
parallelrisch | \(-\frac {6 b B \,x^{4}+3 A b \,x^{2}+3 B a \,x^{2}+2 A a}{12 x^{6}}\) | \(32\) |
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Time = 0.25 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.88 \[ \int \frac {\left (a+b x^2\right ) \left (A+B x^2\right )}{x^7} \, dx=-\frac {6 \, B b x^{4} + 3 \, {\left (B a + A b\right )} x^{2} + 2 \, A a}{12 \, x^{6}} \]
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Time = 0.26 (sec) , antiderivative size = 32, normalized size of antiderivative = 0.97 \[ \int \frac {\left (a+b x^2\right ) \left (A+B x^2\right )}{x^7} \, dx=\frac {- 2 A a - 6 B b x^{4} + x^{2} \left (- 3 A b - 3 B a\right )}{12 x^{6}} \]
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Time = 0.19 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.88 \[ \int \frac {\left (a+b x^2\right ) \left (A+B x^2\right )}{x^7} \, dx=-\frac {6 \, B b x^{4} + 3 \, {\left (B a + A b\right )} x^{2} + 2 \, A a}{12 \, x^{6}} \]
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Time = 0.29 (sec) , antiderivative size = 31, normalized size of antiderivative = 0.94 \[ \int \frac {\left (a+b x^2\right ) \left (A+B x^2\right )}{x^7} \, dx=-\frac {6 \, B b x^{4} + 3 \, B a x^{2} + 3 \, A b x^{2} + 2 \, A a}{12 \, x^{6}} \]
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Time = 0.04 (sec) , antiderivative size = 30, normalized size of antiderivative = 0.91 \[ \int \frac {\left (a+b x^2\right ) \left (A+B x^2\right )}{x^7} \, dx=-\frac {\frac {B\,b\,x^4}{2}+\left (\frac {A\,b}{4}+\frac {B\,a}{4}\right )\,x^2+\frac {A\,a}{6}}{x^6} \]
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