Optimal. Leaf size=63 \[ -\frac{2 \tan ^{-1}\left (\frac{\sqrt{\sqrt{a^2+x^2}+x}}{\sqrt{a}}\right )}{a^{3/2}}-\frac{2 \tanh ^{-1}\left (\frac{\sqrt{\sqrt{a^2+x^2}+x}}{\sqrt{a}}\right )}{a^{3/2}} \]
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Rubi [A] time = 0.219029, antiderivative size = 63, normalized size of antiderivative = 1., number of steps used = 5, number of rules used = 5, integrand size = 32, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.156, Rules used = {2120, 329, 212, 206, 203} \[ -\frac{2 \tan ^{-1}\left (\frac{\sqrt{\sqrt{a^2+x^2}+x}}{\sqrt{a}}\right )}{a^{3/2}}-\frac{2 \tanh ^{-1}\left (\frac{\sqrt{\sqrt{a^2+x^2}+x}}{\sqrt{a}}\right )}{a^{3/2}} \]
Antiderivative was successfully verified.
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Rule 2120
Rule 329
Rule 212
Rule 206
Rule 203
Rubi steps
\begin{align*} \int \frac{1}{x \sqrt{a^2+x^2} \sqrt{x+\sqrt{a^2+x^2}}} \, dx &=2 \operatorname{Subst}\left (\int \frac{1}{\sqrt{x} \left (-a^2+x^2\right )} \, dx,x,x+\sqrt{a^2+x^2}\right )\\ &=4 \operatorname{Subst}\left (\int \frac{1}{-a^2+x^4} \, dx,x,\sqrt{x+\sqrt{a^2+x^2}}\right )\\ &=-\frac{2 \operatorname{Subst}\left (\int \frac{1}{a-x^2} \, dx,x,\sqrt{x+\sqrt{a^2+x^2}}\right )}{a}-\frac{2 \operatorname{Subst}\left (\int \frac{1}{a+x^2} \, dx,x,\sqrt{x+\sqrt{a^2+x^2}}\right )}{a}\\ &=-\frac{2 \tan ^{-1}\left (\frac{\sqrt{x+\sqrt{a^2+x^2}}}{\sqrt{a}}\right )}{a^{3/2}}-\frac{2 \tanh ^{-1}\left (\frac{\sqrt{x+\sqrt{a^2+x^2}}}{\sqrt{a}}\right )}{a^{3/2}}\\ \end{align*}
Mathematica [A] time = 0.192124, size = 56, normalized size = 0.89 \[ -\frac{2 \left (\tan ^{-1}\left (\frac{\sqrt{\sqrt{a^2+x^2}+x}}{\sqrt{a}}\right )+\tanh ^{-1}\left (\frac{\sqrt{\sqrt{a^2+x^2}+x}}{\sqrt{a}}\right )\right )}{a^{3/2}} \]
Antiderivative was successfully verified.
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Maple [F] time = 0.019, size = 0, normalized size = 0. \begin{align*} \int{\frac{1}{x}{\frac{1}{\sqrt{{a}^{2}+{x}^{2}}}}{\frac{1}{\sqrt{x+\sqrt{{a}^{2}+{x}^{2}}}}}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{\sqrt{a^{2} + x^{2}} \sqrt{x + \sqrt{a^{2} + x^{2}}} x}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 2.42215, size = 487, normalized size = 7.73 \begin{align*} \left [-\frac{2 \, \sqrt{a} \arctan \left (\frac{\sqrt{x + \sqrt{a^{2} + x^{2}}}}{\sqrt{a}}\right ) - \sqrt{a} \log \left (\frac{a^{2} + \sqrt{a^{2} + x^{2}} a -{\left ({\left (a - x\right )} \sqrt{a} + \sqrt{a^{2} + x^{2}} \sqrt{a}\right )} \sqrt{x + \sqrt{a^{2} + x^{2}}}}{x}\right )}{a^{2}}, \frac{2 \, \sqrt{-a} \arctan \left (\frac{\sqrt{-a} \sqrt{x + \sqrt{a^{2} + x^{2}}}}{a}\right ) - \sqrt{-a} \log \left (-\frac{a^{2} - \sqrt{a^{2} + x^{2}} a -{\left (\sqrt{-a}{\left (a + x\right )} - \sqrt{a^{2} + x^{2}} \sqrt{-a}\right )} \sqrt{x + \sqrt{a^{2} + x^{2}}}}{x}\right )}{a^{2}}\right ] \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [C] time = 1.59298, size = 46, normalized size = 0.73 \begin{align*} - \frac{\Gamma ^{2}\left (\frac{3}{4}\right ) \Gamma \left (\frac{5}{4}\right ){{}_{3}F_{2}\left (\begin{matrix} \frac{3}{4}, \frac{3}{4}, \frac{5}{4} \\ \frac{3}{2}, \frac{7}{4} \end{matrix}\middle |{\frac{a^{2} e^{i \pi }}{x^{2}}} \right )}}{\pi x^{\frac{3}{2}} \Gamma \left (\frac{7}{4}\right )} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{\sqrt{a^{2} + x^{2}} \sqrt{x + \sqrt{a^{2} + x^{2}}} x}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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