Optimal. Leaf size=113 \[ -\frac{2 i a^3 \sqrt{a^2 x^2+1}}{3 x}+\frac{3 a^2 \sqrt{a^2 x^2+1}}{8 x^2}+\frac{i a \sqrt{a^2 x^2+1}}{3 x^3}-\frac{\sqrt{a^2 x^2+1}}{4 x^4}-\frac{3}{8} a^4 \tanh ^{-1}\left (\sqrt{a^2 x^2+1}\right ) \]
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Rubi [A] time = 0.0891088, antiderivative size = 113, normalized size of antiderivative = 1., number of steps used = 8, number of rules used = 6, integrand size = 14, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.429, Rules used = {5060, 835, 807, 266, 63, 208} \[ -\frac{2 i a^3 \sqrt{a^2 x^2+1}}{3 x}+\frac{3 a^2 \sqrt{a^2 x^2+1}}{8 x^2}+\frac{i a \sqrt{a^2 x^2+1}}{3 x^3}-\frac{\sqrt{a^2 x^2+1}}{4 x^4}-\frac{3}{8} a^4 \tanh ^{-1}\left (\sqrt{a^2 x^2+1}\right ) \]
Antiderivative was successfully verified.
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Rule 5060
Rule 835
Rule 807
Rule 266
Rule 63
Rule 208
Rubi steps
\begin{align*} \int \frac{e^{-i \tan ^{-1}(a x)}}{x^5} \, dx &=\int \frac{1-i a x}{x^5 \sqrt{1+a^2 x^2}} \, dx\\ &=-\frac{\sqrt{1+a^2 x^2}}{4 x^4}-\frac{1}{4} \int \frac{4 i a+3 a^2 x}{x^4 \sqrt{1+a^2 x^2}} \, dx\\ &=-\frac{\sqrt{1+a^2 x^2}}{4 x^4}+\frac{i a \sqrt{1+a^2 x^2}}{3 x^3}+\frac{1}{12} \int \frac{-9 a^2+8 i a^3 x}{x^3 \sqrt{1+a^2 x^2}} \, dx\\ &=-\frac{\sqrt{1+a^2 x^2}}{4 x^4}+\frac{i a \sqrt{1+a^2 x^2}}{3 x^3}+\frac{3 a^2 \sqrt{1+a^2 x^2}}{8 x^2}-\frac{1}{24} \int \frac{-16 i a^3-9 a^4 x}{x^2 \sqrt{1+a^2 x^2}} \, dx\\ &=-\frac{\sqrt{1+a^2 x^2}}{4 x^4}+\frac{i a \sqrt{1+a^2 x^2}}{3 x^3}+\frac{3 a^2 \sqrt{1+a^2 x^2}}{8 x^2}-\frac{2 i a^3 \sqrt{1+a^2 x^2}}{3 x}+\frac{1}{8} \left (3 a^4\right ) \int \frac{1}{x \sqrt{1+a^2 x^2}} \, dx\\ &=-\frac{\sqrt{1+a^2 x^2}}{4 x^4}+\frac{i a \sqrt{1+a^2 x^2}}{3 x^3}+\frac{3 a^2 \sqrt{1+a^2 x^2}}{8 x^2}-\frac{2 i a^3 \sqrt{1+a^2 x^2}}{3 x}+\frac{1}{16} \left (3 a^4\right ) \operatorname{Subst}\left (\int \frac{1}{x \sqrt{1+a^2 x}} \, dx,x,x^2\right )\\ &=-\frac{\sqrt{1+a^2 x^2}}{4 x^4}+\frac{i a \sqrt{1+a^2 x^2}}{3 x^3}+\frac{3 a^2 \sqrt{1+a^2 x^2}}{8 x^2}-\frac{2 i a^3 \sqrt{1+a^2 x^2}}{3 x}+\frac{1}{8} \left (3 a^2\right ) \operatorname{Subst}\left (\int \frac{1}{-\frac{1}{a^2}+\frac{x^2}{a^2}} \, dx,x,\sqrt{1+a^2 x^2}\right )\\ &=-\frac{\sqrt{1+a^2 x^2}}{4 x^4}+\frac{i a \sqrt{1+a^2 x^2}}{3 x^3}+\frac{3 a^2 \sqrt{1+a^2 x^2}}{8 x^2}-\frac{2 i a^3 \sqrt{1+a^2 x^2}}{3 x}-\frac{3}{8} a^4 \tanh ^{-1}\left (\sqrt{1+a^2 x^2}\right )\\ \end{align*}
Mathematica [A] time = 0.0566261, size = 76, normalized size = 0.67 \[ \frac{1}{24} \left (\frac{\sqrt{a^2 x^2+1} \left (-16 i a^3 x^3+9 a^2 x^2+8 i a x-6\right )}{x^4}-9 a^4 \log \left (\sqrt{a^2 x^2+1}+1\right )+9 a^4 \log (x)\right ) \]
Warning: Unable to verify antiderivative.
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Maple [B] time = 0.082, size = 259, normalized size = 2.3 \begin{align*}{\frac{5\,{a}^{2}}{8\,{x}^{2}} \left ({a}^{2}{x}^{2}+1 \right ) ^{{\frac{3}{2}}}}-{\frac{3\,{a}^{4}}{8}{\it Artanh} \left ({\frac{1}{\sqrt{{a}^{2}{x}^{2}+1}}} \right ) }+{\frac{3\,{a}^{4}}{8}\sqrt{{a}^{2}{x}^{2}+1}}-{\frac{1}{4\,{x}^{4}} \left ({a}^{2}{x}^{2}+1 \right ) ^{{\frac{3}{2}}}}-{\frac{i{a}^{3}}{x} \left ({a}^{2}{x}^{2}+1 \right ) ^{{\frac{3}{2}}}}+i{a}^{5}x\sqrt{{a}^{2}{x}^{2}+1}+{i{a}^{5}\ln \left ({{a}^{2}x{\frac{1}{\sqrt{{a}^{2}}}}}+\sqrt{{a}^{2}{x}^{2}+1} \right ){\frac{1}{\sqrt{{a}^{2}}}}}-{a}^{4}\sqrt{{a}^{2} \left ( x-{\frac{i}{a}} \right ) ^{2}+2\,ia \left ( x-{\frac{i}{a}} \right ) }-{i{a}^{5}\ln \left ({ \left ( ia+{a}^{2} \left ( x-{\frac{i}{a}} \right ) \right ){\frac{1}{\sqrt{{a}^{2}}}}}+\sqrt{{a}^{2} \left ( x-{\frac{i}{a}} \right ) ^{2}+2\,ia \left ( x-{\frac{i}{a}} \right ) } \right ){\frac{1}{\sqrt{{a}^{2}}}}}+{\frac{{\frac{i}{3}}a}{{x}^{3}} \left ({a}^{2}{x}^{2}+1 \right ) ^{{\frac{3}{2}}}} \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{\sqrt{a^{2} x^{2} + 1}}{{\left (i \, a x + 1\right )} x^{5}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.78315, size = 243, normalized size = 2.15 \begin{align*} -\frac{9 \, a^{4} x^{4} \log \left (-a x + \sqrt{a^{2} x^{2} + 1} + 1\right ) - 9 \, a^{4} x^{4} \log \left (-a x + \sqrt{a^{2} x^{2} + 1} - 1\right ) + 16 i \, a^{4} x^{4} -{\left (-16 i \, a^{3} x^{3} + 9 \, a^{2} x^{2} + 8 i \, a x - 6\right )} \sqrt{a^{2} x^{2} + 1}}{24 \, x^{4}} \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{\sqrt{a^{2} x^{2} + 1}}{x^{5} \left (i a x + 1\right )}\, dx \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*} \mathit{undef} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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