Optimal. Leaf size=93 \[ -\frac{7 x^5}{24 b^2 \left (a+b x^2\right )^2}-\frac{35 x^3}{48 b^3 \left (a+b x^2\right )}-\frac{35 \sqrt{a} \tan ^{-1}\left (\frac{\sqrt{b} x}{\sqrt{a}}\right )}{16 b^{9/2}}-\frac{x^7}{6 b \left (a+b x^2\right )^3}+\frac{35 x}{16 b^4} \]
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Rubi [A] time = 0.0466813, antiderivative size = 93, normalized size of antiderivative = 1., number of steps used = 6, number of rules used = 4, integrand size = 24, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.167, Rules used = {28, 288, 321, 205} \[ -\frac{7 x^5}{24 b^2 \left (a+b x^2\right )^2}-\frac{35 x^3}{48 b^3 \left (a+b x^2\right )}-\frac{35 \sqrt{a} \tan ^{-1}\left (\frac{\sqrt{b} x}{\sqrt{a}}\right )}{16 b^{9/2}}-\frac{x^7}{6 b \left (a+b x^2\right )^3}+\frac{35 x}{16 b^4} \]
Antiderivative was successfully verified.
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Rule 28
Rule 288
Rule 321
Rule 205
Rubi steps
\begin{align*} \int \frac{x^8}{\left (a^2+2 a b x^2+b^2 x^4\right )^2} \, dx &=b^4 \int \frac{x^8}{\left (a b+b^2 x^2\right )^4} \, dx\\ &=-\frac{x^7}{6 b \left (a+b x^2\right )^3}+\frac{1}{6} \left (7 b^2\right ) \int \frac{x^6}{\left (a b+b^2 x^2\right )^3} \, dx\\ &=-\frac{x^7}{6 b \left (a+b x^2\right )^3}-\frac{7 x^5}{24 b^2 \left (a+b x^2\right )^2}+\frac{35}{24} \int \frac{x^4}{\left (a b+b^2 x^2\right )^2} \, dx\\ &=-\frac{x^7}{6 b \left (a+b x^2\right )^3}-\frac{7 x^5}{24 b^2 \left (a+b x^2\right )^2}-\frac{35 x^3}{48 b^3 \left (a+b x^2\right )}+\frac{35 \int \frac{x^2}{a b+b^2 x^2} \, dx}{16 b^2}\\ &=\frac{35 x}{16 b^4}-\frac{x^7}{6 b \left (a+b x^2\right )^3}-\frac{7 x^5}{24 b^2 \left (a+b x^2\right )^2}-\frac{35 x^3}{48 b^3 \left (a+b x^2\right )}-\frac{(35 a) \int \frac{1}{a b+b^2 x^2} \, dx}{16 b^3}\\ &=\frac{35 x}{16 b^4}-\frac{x^7}{6 b \left (a+b x^2\right )^3}-\frac{7 x^5}{24 b^2 \left (a+b x^2\right )^2}-\frac{35 x^3}{48 b^3 \left (a+b x^2\right )}-\frac{35 \sqrt{a} \tan ^{-1}\left (\frac{\sqrt{b} x}{\sqrt{a}}\right )}{16 b^{9/2}}\\ \end{align*}
Mathematica [A] time = 0.0438906, size = 77, normalized size = 0.83 \[ \frac{280 a^2 b x^3+105 a^3 x+231 a b^2 x^5+48 b^3 x^7}{48 b^4 \left (a+b x^2\right )^3}-\frac{35 \sqrt{a} \tan ^{-1}\left (\frac{\sqrt{b} x}{\sqrt{a}}\right )}{16 b^{9/2}} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.054, size = 83, normalized size = 0.9 \begin{align*}{\frac{x}{{b}^{4}}}+{\frac{29\,a{x}^{5}}{16\,{b}^{2} \left ( b{x}^{2}+a \right ) ^{3}}}+{\frac{17\,{a}^{2}{x}^{3}}{6\,{b}^{3} \left ( b{x}^{2}+a \right ) ^{3}}}+{\frac{19\,x{a}^{3}}{16\,{b}^{4} \left ( b{x}^{2}+a \right ) ^{3}}}-{\frac{35\,a}{16\,{b}^{4}}\arctan \left ({bx{\frac{1}{\sqrt{ab}}}} \right ){\frac{1}{\sqrt{ab}}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: ValueError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.73532, size = 571, normalized size = 6.14 \begin{align*} \left [\frac{96 \, b^{3} x^{7} + 462 \, a b^{2} x^{5} + 560 \, a^{2} b x^{3} + 210 \, a^{3} x + 105 \,{\left (b^{3} x^{6} + 3 \, a b^{2} x^{4} + 3 \, a^{2} b x^{2} + a^{3}\right )} \sqrt{-\frac{a}{b}} \log \left (\frac{b x^{2} - 2 \, b x \sqrt{-\frac{a}{b}} - a}{b x^{2} + a}\right )}{96 \,{\left (b^{7} x^{6} + 3 \, a b^{6} x^{4} + 3 \, a^{2} b^{5} x^{2} + a^{3} b^{4}\right )}}, \frac{48 \, b^{3} x^{7} + 231 \, a b^{2} x^{5} + 280 \, a^{2} b x^{3} + 105 \, a^{3} x - 105 \,{\left (b^{3} x^{6} + 3 \, a b^{2} x^{4} + 3 \, a^{2} b x^{2} + a^{3}\right )} \sqrt{\frac{a}{b}} \arctan \left (\frac{b x \sqrt{\frac{a}{b}}}{a}\right )}{48 \,{\left (b^{7} x^{6} + 3 \, a b^{6} x^{4} + 3 \, a^{2} b^{5} x^{2} + a^{3} b^{4}\right )}}\right ] \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.744338, size = 131, normalized size = 1.41 \begin{align*} \frac{35 \sqrt{- \frac{a}{b^{9}}} \log{\left (- b^{4} \sqrt{- \frac{a}{b^{9}}} + x \right )}}{32} - \frac{35 \sqrt{- \frac{a}{b^{9}}} \log{\left (b^{4} \sqrt{- \frac{a}{b^{9}}} + x \right )}}{32} + \frac{57 a^{3} x + 136 a^{2} b x^{3} + 87 a b^{2} x^{5}}{48 a^{3} b^{4} + 144 a^{2} b^{5} x^{2} + 144 a b^{6} x^{4} + 48 b^{7} x^{6}} + \frac{x}{b^{4}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.1114, size = 88, normalized size = 0.95 \begin{align*} -\frac{35 \, a \arctan \left (\frac{b x}{\sqrt{a b}}\right )}{16 \, \sqrt{a b} b^{4}} + \frac{x}{b^{4}} + \frac{87 \, a b^{2} x^{5} + 136 \, a^{2} b x^{3} + 57 \, a^{3} x}{48 \,{\left (b x^{2} + a\right )}^{3} b^{4}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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