Optimal. Leaf size=81 \[ -\frac {2^{1-\frac {i n}{2}} (1-i a x)^{1+\frac {i n}{2}} \, _2F_1\left (1+\frac {i n}{2},\frac {i n}{2};2+\frac {i n}{2};\frac {1}{2} (1-i a x)\right )}{a (2 i-n)} \]
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Rubi [A]
time = 0.01, antiderivative size = 81, normalized size of antiderivative = 1.00, number of steps
used = 2, number of rules used = 2, integrand size = 8, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.250, Rules used = {5169, 71}
\begin {gather*} -\frac {2^{1-\frac {i n}{2}} (1-i a x)^{1+\frac {i n}{2}} \, _2F_1\left (\frac {i n}{2}+1,\frac {i n}{2};\frac {i n}{2}+2;\frac {1}{2} (1-i a x)\right )}{a (-n+2 i)} \end {gather*}
Antiderivative was successfully verified.
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Rule 71
Rule 5169
Rubi steps
\begin {align*} \int e^{n \tan ^{-1}(a x)} \, dx &=\int (1-i a x)^{\frac {i n}{2}} (1+i a x)^{-\frac {i n}{2}} \, dx\\ &=-\frac {2^{1-\frac {i n}{2}} (1-i a x)^{1+\frac {i n}{2}} \, _2F_1\left (1+\frac {i n}{2},\frac {i n}{2};2+\frac {i n}{2};\frac {1}{2} (1-i a x)\right )}{a (2 i-n)}\\ \end {align*}
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Mathematica [A]
time = 0.02, size = 56, normalized size = 0.69 \begin {gather*} \frac {4 e^{(2 i+n) \text {ArcTan}(a x)} \, _2F_1\left (2,1-\frac {i n}{2};2-\frac {i n}{2};-e^{2 i \text {ArcTan}(a x)}\right )}{a (2 i+n)} \end {gather*}
Antiderivative was successfully verified.
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Maple [F]
time = 0.00, size = 0, normalized size = 0.00 \[\int {\mathrm e}^{n \arctan \left (a x \right )}\, dx\]
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Failed to integrate} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {could not integrate} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int e^{n \operatorname {atan}{\left (a x \right )}}\, dx \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {could not integrate} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [F]
time = 0.00, size = -1, normalized size = -0.01 \begin {gather*} \int {\mathrm {e}}^{n\,\mathrm {atan}\left (a\,x\right )} \,d x \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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