Optimal. Leaf size=674 \[ \frac{i (1-i a x)^{7/8} \sqrt [8]{1+i a x}}{a}+\frac{i \sqrt{2-\sqrt{2}} \log \left (\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}-\frac{\sqrt{2-\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}+1\right )}{8 a}-\frac{i \sqrt{2-\sqrt{2}} \log \left (\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}+\frac{\sqrt{2-\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}+1\right )}{8 a}+\frac{i \sqrt{2+\sqrt{2}} \log \left (\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}-\frac{\sqrt{2+\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}+1\right )}{8 a}-\frac{i \sqrt{2+\sqrt{2}} \log \left (\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}+\frac{\sqrt{2+\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}+1\right )}{8 a}-\frac{i \sqrt{2+\sqrt{2}} \tan ^{-1}\left (\frac{\sqrt{2-\sqrt{2}}-\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}}{\sqrt{2+\sqrt{2}}}\right )}{4 a}-\frac{i \sqrt{2-\sqrt{2}} \tan ^{-1}\left (\frac{\sqrt{2+\sqrt{2}}-\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}}{\sqrt{2-\sqrt{2}}}\right )}{4 a}+\frac{i \sqrt{2+\sqrt{2}} \tan ^{-1}\left (\frac{\sqrt{2-\sqrt{2}}+\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}}{\sqrt{2+\sqrt{2}}}\right )}{4 a}+\frac{i \sqrt{2-\sqrt{2}} \tan ^{-1}\left (\frac{\sqrt{2+\sqrt{2}}+\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}}{\sqrt{2-\sqrt{2}}}\right )}{4 a} \]
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Rubi [A] time = 0.433852, antiderivative size = 674, normalized size of antiderivative = 1., number of steps used = 25, number of rules used = 11, integrand size = 12, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.917, Rules used = {5061, 50, 63, 331, 299, 1122, 1169, 634, 618, 204, 628} \[ \frac{i (1-i a x)^{7/8} \sqrt [8]{1+i a x}}{a}+\frac{i \sqrt{2-\sqrt{2}} \log \left (\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}-\frac{\sqrt{2-\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}+1\right )}{8 a}-\frac{i \sqrt{2-\sqrt{2}} \log \left (\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}+\frac{\sqrt{2-\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}+1\right )}{8 a}+\frac{i \sqrt{2+\sqrt{2}} \log \left (\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}-\frac{\sqrt{2+\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}+1\right )}{8 a}-\frac{i \sqrt{2+\sqrt{2}} \log \left (\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}+\frac{\sqrt{2+\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}+1\right )}{8 a}-\frac{i \sqrt{2+\sqrt{2}} \tan ^{-1}\left (\frac{\sqrt{2-\sqrt{2}}-\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}}{\sqrt{2+\sqrt{2}}}\right )}{4 a}-\frac{i \sqrt{2-\sqrt{2}} \tan ^{-1}\left (\frac{\sqrt{2+\sqrt{2}}-\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}}{\sqrt{2-\sqrt{2}}}\right )}{4 a}+\frac{i \sqrt{2+\sqrt{2}} \tan ^{-1}\left (\frac{\sqrt{2-\sqrt{2}}+\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}}{\sqrt{2+\sqrt{2}}}\right )}{4 a}+\frac{i \sqrt{2-\sqrt{2}} \tan ^{-1}\left (\frac{\sqrt{2+\sqrt{2}}+\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}}{\sqrt{2-\sqrt{2}}}\right )}{4 a} \]
Antiderivative was successfully verified.
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Rule 5061
Rule 50
Rule 63
Rule 331
Rule 299
Rule 1122
Rule 1169
Rule 634
Rule 618
Rule 204
Rule 628
Rubi steps
\begin{align*} \int e^{\frac{1}{4} i \tan ^{-1}(a x)} \, dx &=\int \frac{\sqrt [8]{1+i a x}}{\sqrt [8]{1-i a x}} \, dx\\ &=\frac{i (1-i a x)^{7/8} \sqrt [8]{1+i a x}}{a}+\frac{1}{4} \int \frac{1}{\sqrt [8]{1-i a x} (1+i a x)^{7/8}} \, dx\\ &=\frac{i (1-i a x)^{7/8} \sqrt [8]{1+i a x}}{a}+\frac{(2 i) \operatorname{Subst}\left (\int \frac{x^6}{\left (2-x^8\right )^{7/8}} \, dx,x,\sqrt [8]{1-i a x}\right )}{a}\\ &=\frac{i (1-i a x)^{7/8} \sqrt [8]{1+i a x}}{a}+\frac{(2 i) \operatorname{Subst}\left (\int \frac{x^6}{1+x^8} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{a}\\ &=\frac{i (1-i a x)^{7/8} \sqrt [8]{1+i a x}}{a}+\frac{i \operatorname{Subst}\left (\int \frac{x^4}{1-\sqrt{2} x^2+x^4} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{\sqrt{2} a}-\frac{i \operatorname{Subst}\left (\int \frac{x^4}{1+\sqrt{2} x^2+x^4} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{\sqrt{2} a}\\ &=\frac{i (1-i a x)^{7/8} \sqrt [8]{1+i a x}}{a}-\frac{i \operatorname{Subst}\left (\int \frac{1-\sqrt{2} x^2}{1-\sqrt{2} x^2+x^4} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{\sqrt{2} a}+\frac{i \operatorname{Subst}\left (\int \frac{1+\sqrt{2} x^2}{1+\sqrt{2} x^2+x^4} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{\sqrt{2} a}\\ &=\frac{i (1-i a x)^{7/8} \sqrt [8]{1+i a x}}{a}+\frac{i \operatorname{Subst}\left (\int \frac{\sqrt{2-\sqrt{2}}-\left (1-\sqrt{2}\right ) x}{1-\sqrt{2-\sqrt{2}} x+x^2} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{2 \sqrt{2 \left (2-\sqrt{2}\right )} a}+\frac{i \operatorname{Subst}\left (\int \frac{\sqrt{2-\sqrt{2}}+\left (1-\sqrt{2}\right ) x}{1+\sqrt{2-\sqrt{2}} x+x^2} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{2 \sqrt{2 \left (2-\sqrt{2}\right )} a}-\frac{i \operatorname{Subst}\left (\int \frac{\sqrt{2+\sqrt{2}}-\left (1+\sqrt{2}\right ) x}{1-\sqrt{2+\sqrt{2}} x+x^2} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{2 \sqrt{2 \left (2+\sqrt{2}\right )} a}-\frac{i \operatorname{Subst}\left (\int \frac{\sqrt{2+\sqrt{2}}+\left (1+\sqrt{2}\right ) x}{1+\sqrt{2+\sqrt{2}} x+x^2} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{2 \sqrt{2 \left (2+\sqrt{2}\right )} a}\\ &=\frac{i (1-i a x)^{7/8} \sqrt [8]{1+i a x}}{a}+\frac{\left (i \sqrt{\frac{1}{2} \left (3-2 \sqrt{2}\right )}\right ) \operatorname{Subst}\left (\int \frac{1}{1-\sqrt{2+\sqrt{2}} x+x^2} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{4 a}+\frac{\left (i \sqrt{\frac{1}{2} \left (3-2 \sqrt{2}\right )}\right ) \operatorname{Subst}\left (\int \frac{1}{1+\sqrt{2+\sqrt{2}} x+x^2} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{4 a}+\frac{\left (i \sqrt{2-\sqrt{2}}\right ) \operatorname{Subst}\left (\int \frac{-\sqrt{2-\sqrt{2}}+2 x}{1-\sqrt{2-\sqrt{2}} x+x^2} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{8 a}-\frac{\left (i \sqrt{2-\sqrt{2}}\right ) \operatorname{Subst}\left (\int \frac{\sqrt{2-\sqrt{2}}+2 x}{1+\sqrt{2-\sqrt{2}} x+x^2} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{8 a}+\frac{\left (i \sqrt{2+\sqrt{2}}\right ) \operatorname{Subst}\left (\int \frac{-\sqrt{2+\sqrt{2}}+2 x}{1-\sqrt{2+\sqrt{2}} x+x^2} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{8 a}-\frac{\left (i \sqrt{2+\sqrt{2}}\right ) \operatorname{Subst}\left (\int \frac{\sqrt{2+\sqrt{2}}+2 x}{1+\sqrt{2+\sqrt{2}} x+x^2} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{8 a}+\frac{\left (i \sqrt{\frac{1}{2} \left (3+2 \sqrt{2}\right )}\right ) \operatorname{Subst}\left (\int \frac{1}{1-\sqrt{2-\sqrt{2}} x+x^2} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{4 a}+\frac{\left (i \sqrt{\frac{1}{2} \left (3+2 \sqrt{2}\right )}\right ) \operatorname{Subst}\left (\int \frac{1}{1+\sqrt{2-\sqrt{2}} x+x^2} \, dx,x,\frac{\sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{4 a}\\ &=\frac{i (1-i a x)^{7/8} \sqrt [8]{1+i a x}}{a}+\frac{i \sqrt{2-\sqrt{2}} \log \left (1+\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}-\frac{\sqrt{2-\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{8 a}-\frac{i \sqrt{2-\sqrt{2}} \log \left (1+\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}+\frac{\sqrt{2-\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{8 a}+\frac{i \sqrt{2+\sqrt{2}} \log \left (1+\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}-\frac{\sqrt{2+\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{8 a}-\frac{i \sqrt{2+\sqrt{2}} \log \left (1+\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}+\frac{\sqrt{2+\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{8 a}-\frac{\left (i \sqrt{\frac{1}{2} \left (3-2 \sqrt{2}\right )}\right ) \operatorname{Subst}\left (\int \frac{1}{-2+\sqrt{2}-x^2} \, dx,x,-\sqrt{2+\sqrt{2}}+\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{2 a}-\frac{\left (i \sqrt{\frac{1}{2} \left (3-2 \sqrt{2}\right )}\right ) \operatorname{Subst}\left (\int \frac{1}{-2+\sqrt{2}-x^2} \, dx,x,\sqrt{2+\sqrt{2}}+\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{2 a}-\frac{\left (i \sqrt{\frac{1}{2} \left (3+2 \sqrt{2}\right )}\right ) \operatorname{Subst}\left (\int \frac{1}{-2-\sqrt{2}-x^2} \, dx,x,-\sqrt{2-\sqrt{2}}+\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{2 a}-\frac{\left (i \sqrt{\frac{1}{2} \left (3+2 \sqrt{2}\right )}\right ) \operatorname{Subst}\left (\int \frac{1}{-2-\sqrt{2}-x^2} \, dx,x,\sqrt{2-\sqrt{2}}+\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{2 a}\\ &=\frac{i (1-i a x)^{7/8} \sqrt [8]{1+i a x}}{a}-\frac{i \sqrt{2+\sqrt{2}} \tan ^{-1}\left (\frac{\sqrt{2-\sqrt{2}}-\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}}{\sqrt{2+\sqrt{2}}}\right )}{4 a}-\frac{i \sqrt{2-\sqrt{2}} \tan ^{-1}\left (\frac{\sqrt{2+\sqrt{2}}-\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}}{\sqrt{2-\sqrt{2}}}\right )}{4 a}+\frac{i \sqrt{2+\sqrt{2}} \tan ^{-1}\left (\frac{\sqrt{2-\sqrt{2}}+\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}}{\sqrt{2+\sqrt{2}}}\right )}{4 a}+\frac{i \sqrt{2-\sqrt{2}} \tan ^{-1}\left (\frac{\sqrt{2+\sqrt{2}}+\frac{2 \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}}{\sqrt{2-\sqrt{2}}}\right )}{4 a}+\frac{i \sqrt{2-\sqrt{2}} \log \left (1+\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}-\frac{\sqrt{2-\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{8 a}-\frac{i \sqrt{2-\sqrt{2}} \log \left (1+\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}+\frac{\sqrt{2-\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{8 a}+\frac{i \sqrt{2+\sqrt{2}} \log \left (1+\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}-\frac{\sqrt{2+\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{8 a}-\frac{i \sqrt{2+\sqrt{2}} \log \left (1+\frac{\sqrt [4]{1-i a x}}{\sqrt [4]{1+i a x}}+\frac{\sqrt{2+\sqrt{2}} \sqrt [8]{1-i a x}}{\sqrt [8]{1+i a x}}\right )}{8 a}\\ \end{align*}
Mathematica [C] time = 0.0217621, size = 41, normalized size = 0.06 \[ -\frac{16 i e^{\frac{9}{4} i \tan ^{-1}(a x)} \text{Hypergeometric2F1}\left (\frac{9}{8},2,\frac{17}{8},-e^{2 i \tan ^{-1}(a x)}\right )}{9 a} \]
Warning: Unable to verify antiderivative.
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Maple [F] time = 0.05, size = 0, normalized size = 0. \begin{align*} \int \sqrt [4]{{(1+iax){\frac{1}{\sqrt{{a}^{2}{x}^{2}+1}}}}}\, 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 \left (\frac{i \, a x + 1}{\sqrt{a^{2} x^{2} + 1}}\right )^{\frac{1}{4}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.79819, size = 1115, normalized size = 1.65 \begin{align*} \frac{-i \, a \left (\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} \log \left (4 \, a \left (\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} + \left (\frac{i \, \sqrt{a^{2} x^{2} + 1}}{a x + i}\right )^{\frac{1}{4}}\right ) + a \left (\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} \log \left (4 i \, a \left (\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} + \left (\frac{i \, \sqrt{a^{2} x^{2} + 1}}{a x + i}\right )^{\frac{1}{4}}\right ) - a \left (\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} \log \left (-4 i \, a \left (\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} + \left (\frac{i \, \sqrt{a^{2} x^{2} + 1}}{a x + i}\right )^{\frac{1}{4}}\right ) + i \, a \left (\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} \log \left (-4 \, a \left (\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} + \left (\frac{i \, \sqrt{a^{2} x^{2} + 1}}{a x + i}\right )^{\frac{1}{4}}\right ) - i \, a \left (-\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} \log \left (4 \, a \left (-\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} + \left (\frac{i \, \sqrt{a^{2} x^{2} + 1}}{a x + i}\right )^{\frac{1}{4}}\right ) + a \left (-\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} \log \left (4 i \, a \left (-\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} + \left (\frac{i \, \sqrt{a^{2} x^{2} + 1}}{a x + i}\right )^{\frac{1}{4}}\right ) - a \left (-\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} \log \left (-4 i \, a \left (-\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} + \left (\frac{i \, \sqrt{a^{2} x^{2} + 1}}{a x + i}\right )^{\frac{1}{4}}\right ) + i \, a \left (-\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} \log \left (-4 \, a \left (-\frac{i}{256 \, a^{4}}\right )^{\frac{1}{4}} + \left (\frac{i \, \sqrt{a^{2} x^{2} + 1}}{a x + i}\right )^{\frac{1}{4}}\right ) +{\left (a x + i\right )} \left (\frac{i \, \sqrt{a^{2} x^{2} + 1}}{a x + i}\right )^{\frac{1}{4}}}{a} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F(-1)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Timed out} \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 \left (\frac{i \, a x + 1}{\sqrt{a^{2} x^{2} + 1}}\right )^{\frac{1}{4}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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