Optimal. Leaf size=49 \[ -\frac{a^2 \log \left (a x^2+b\right )}{2 b^3}+\frac{a^2 \log (x)}{b^3}+\frac{a}{2 b^2 x^2}-\frac{1}{4 b x^4} \]
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Rubi [A] time = 0.0304958, antiderivative size = 49, normalized size of antiderivative = 1., number of steps used = 4, number of rules used = 3, integrand size = 13, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.231, Rules used = {263, 266, 44} \[ -\frac{a^2 \log \left (a x^2+b\right )}{2 b^3}+\frac{a^2 \log (x)}{b^3}+\frac{a}{2 b^2 x^2}-\frac{1}{4 b x^4} \]
Antiderivative was successfully verified.
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Rule 263
Rule 266
Rule 44
Rubi steps
\begin{align*} \int \frac{1}{\left (a+\frac{b}{x^2}\right ) x^7} \, dx &=\int \frac{1}{x^5 \left (b+a x^2\right )} \, dx\\ &=\frac{1}{2} \operatorname{Subst}\left (\int \frac{1}{x^3 (b+a x)} \, dx,x,x^2\right )\\ &=\frac{1}{2} \operatorname{Subst}\left (\int \left (\frac{1}{b x^3}-\frac{a}{b^2 x^2}+\frac{a^2}{b^3 x}-\frac{a^3}{b^3 (b+a x)}\right ) \, dx,x,x^2\right )\\ &=-\frac{1}{4 b x^4}+\frac{a}{2 b^2 x^2}+\frac{a^2 \log (x)}{b^3}-\frac{a^2 \log \left (b+a x^2\right )}{2 b^3}\\ \end{align*}
Mathematica [A] time = 0.0068308, size = 49, normalized size = 1. \[ -\frac{a^2 \log \left (a x^2+b\right )}{2 b^3}+\frac{a^2 \log (x)}{b^3}+\frac{a}{2 b^2 x^2}-\frac{1}{4 b x^4} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.007, size = 44, normalized size = 0.9 \begin{align*} -{\frac{1}{4\,b{x}^{4}}}+{\frac{a}{2\,{b}^{2}{x}^{2}}}+{\frac{{a}^{2}\ln \left ( x \right ) }{{b}^{3}}}-{\frac{{a}^{2}\ln \left ( a{x}^{2}+b \right ) }{2\,{b}^{3}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 0.97715, size = 63, normalized size = 1.29 \begin{align*} -\frac{a^{2} \log \left (a x^{2} + b\right )}{2 \, b^{3}} + \frac{a^{2} \log \left (x^{2}\right )}{2 \, b^{3}} + \frac{2 \, a x^{2} - b}{4 \, b^{2} x^{4}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.70483, size = 108, normalized size = 2.2 \begin{align*} -\frac{2 \, a^{2} x^{4} \log \left (a x^{2} + b\right ) - 4 \, a^{2} x^{4} \log \left (x\right ) - 2 \, a b x^{2} + b^{2}}{4 \, b^{3} x^{4}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.62907, size = 42, normalized size = 0.86 \begin{align*} \frac{a^{2} \log{\left (x \right )}}{b^{3}} - \frac{a^{2} \log{\left (x^{2} + \frac{b}{a} \right )}}{2 b^{3}} + \frac{2 a x^{2} - b}{4 b^{2} x^{4}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.1739, size = 77, normalized size = 1.57 \begin{align*} \frac{a^{2} \log \left (x^{2}\right )}{2 \, b^{3}} - \frac{a^{2} \log \left ({\left | a x^{2} + b \right |}\right )}{2 \, b^{3}} - \frac{3 \, a^{2} x^{4} - 2 \, a b x^{2} + b^{2}}{4 \, b^{3} x^{4}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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