Optimal. Leaf size=100 \[ \frac{\left (-4 a B c-4 A b c+3 b^2 B\right ) \tanh ^{-1}\left (\frac{b+2 c x^2}{2 \sqrt{c} \sqrt{a+b x^2+c x^4}}\right )}{16 c^{5/2}}-\frac{\sqrt{a+b x^2+c x^4} \left (-4 A c+3 b B-2 B c x^2\right )}{8 c^2} \]
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Rubi [A] time = 0.0927491, antiderivative size = 100, normalized size of antiderivative = 1., number of steps used = 4, number of rules used = 4, integrand size = 27, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.148, Rules used = {1251, 779, 621, 206} \[ \frac{\left (-4 a B c-4 A b c+3 b^2 B\right ) \tanh ^{-1}\left (\frac{b+2 c x^2}{2 \sqrt{c} \sqrt{a+b x^2+c x^4}}\right )}{16 c^{5/2}}-\frac{\sqrt{a+b x^2+c x^4} \left (-4 A c+3 b B-2 B c x^2\right )}{8 c^2} \]
Antiderivative was successfully verified.
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Rule 1251
Rule 779
Rule 621
Rule 206
Rubi steps
\begin{align*} \int \frac{x^3 \left (A+B x^2\right )}{\sqrt{a+b x^2+c x^4}} \, dx &=\frac{1}{2} \operatorname{Subst}\left (\int \frac{x (A+B x)}{\sqrt{a+b x+c x^2}} \, dx,x,x^2\right )\\ &=-\frac{\left (3 b B-4 A c-2 B c x^2\right ) \sqrt{a+b x^2+c x^4}}{8 c^2}+\frac{\left (3 b^2 B-4 A b c-4 a B c\right ) \operatorname{Subst}\left (\int \frac{1}{\sqrt{a+b x+c x^2}} \, dx,x,x^2\right )}{16 c^2}\\ &=-\frac{\left (3 b B-4 A c-2 B c x^2\right ) \sqrt{a+b x^2+c x^4}}{8 c^2}+\frac{\left (3 b^2 B-4 A b c-4 a B c\right ) \operatorname{Subst}\left (\int \frac{1}{4 c-x^2} \, dx,x,\frac{b+2 c x^2}{\sqrt{a+b x^2+c x^4}}\right )}{8 c^2}\\ &=-\frac{\left (3 b B-4 A c-2 B c x^2\right ) \sqrt{a+b x^2+c x^4}}{8 c^2}+\frac{\left (3 b^2 B-4 A b c-4 a B c\right ) \tanh ^{-1}\left (\frac{b+2 c x^2}{2 \sqrt{c} \sqrt{a+b x^2+c x^4}}\right )}{16 c^{5/2}}\\ \end{align*}
Mathematica [A] time = 0.0476248, size = 101, normalized size = 1.01 \[ \frac{\left (-4 a B c-4 A b c+3 b^2 B\right ) \tanh ^{-1}\left (\frac{b+2 c x^2}{2 \sqrt{c} \sqrt{a+b x^2+c x^4}}\right )+2 \sqrt{c} \sqrt{a+b x^2+c x^4} \left (4 A c-3 b B+2 B c x^2\right )}{16 c^{5/2}} \]
Antiderivative was successfully verified.
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Maple [B] time = 0.015, size = 176, normalized size = 1.8 \begin{align*}{\frac{B{x}^{2}}{4\,c}\sqrt{c{x}^{4}+b{x}^{2}+a}}-{\frac{3\,bB}{8\,{c}^{2}}\sqrt{c{x}^{4}+b{x}^{2}+a}}+{\frac{3\,{b}^{2}B}{16}\ln \left ({ \left ({\frac{b}{2}}+c{x}^{2} \right ){\frac{1}{\sqrt{c}}}}+\sqrt{c{x}^{4}+b{x}^{2}+a} \right ){c}^{-{\frac{5}{2}}}}-{\frac{aB}{4}\ln \left ({ \left ({\frac{b}{2}}+c{x}^{2} \right ){\frac{1}{\sqrt{c}}}}+\sqrt{c{x}^{4}+b{x}^{2}+a} \right ){c}^{-{\frac{3}{2}}}}+{\frac{A}{2\,c}\sqrt{c{x}^{4}+b{x}^{2}+a}}-{\frac{Ab}{4}\ln \left ({ \left ({\frac{b}{2}}+c{x}^{2} \right ){\frac{1}{\sqrt{c}}}}+\sqrt{c{x}^{4}+b{x}^{2}+a} \right ){c}^{-{\frac{3}{2}}}} \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 = 1.48283, size = 545, normalized size = 5.45 \begin{align*} \left [-\frac{{\left (3 \, B b^{2} - 4 \,{\left (B a + A b\right )} c\right )} \sqrt{c} \log \left (-8 \, c^{2} x^{4} - 8 \, b c x^{2} - b^{2} + 4 \, \sqrt{c x^{4} + b x^{2} + a}{\left (2 \, c x^{2} + b\right )} \sqrt{c} - 4 \, a c\right ) - 4 \,{\left (2 \, B c^{2} x^{2} - 3 \, B b c + 4 \, A c^{2}\right )} \sqrt{c x^{4} + b x^{2} + a}}{32 \, c^{3}}, -\frac{{\left (3 \, B b^{2} - 4 \,{\left (B a + A b\right )} c\right )} \sqrt{-c} \arctan \left (\frac{\sqrt{c x^{4} + b x^{2} + a}{\left (2 \, c x^{2} + b\right )} \sqrt{-c}}{2 \,{\left (c^{2} x^{4} + b c x^{2} + a c\right )}}\right ) - 2 \,{\left (2 \, B c^{2} x^{2} - 3 \, B b c + 4 \, A c^{2}\right )} \sqrt{c x^{4} + b x^{2} + a}}{16 \, c^{3}}\right ] \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{x^{3} \left (A + B x^{2}\right )}{\sqrt{a + b x^{2} + c x^{4}}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.15289, size = 132, normalized size = 1.32 \begin{align*} \frac{1}{8} \, \sqrt{c x^{4} + b x^{2} + a}{\left (\frac{2 \, B x^{2}}{c} - \frac{3 \, B b - 4 \, A c}{c^{2}}\right )} - \frac{{\left (3 \, B b^{2} - 4 \, B a c - 4 \, A b c\right )} \log \left ({\left | -2 \,{\left (\sqrt{c} x^{2} - \sqrt{c x^{4} + b x^{2} + a}\right )} \sqrt{c} - b \right |}\right )}{16 \, c^{\frac{5}{2}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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