Optimal. Leaf size=131 \[ \frac{i \left (n^2-2\right ) e^{n \tan ^{-1}(a x)} \, _2F_1\left (1,-\frac{i n}{2};1-\frac{i n}{2};-e^{2 i \tan ^{-1}(a x)}\right )}{a^4 c n}+\frac{\left (-i n^2+n+2 i\right ) e^{n \tan ^{-1}(a x)}}{2 a^4 c n}+\frac{x^2 e^{n \tan ^{-1}(a x)}}{2 a^2 c}-\frac{n x e^{n \tan ^{-1}(a x)}}{2 a^3 c} \]
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Rubi [A] time = 0.226768, antiderivative size = 206, normalized size of antiderivative = 1.57, number of steps used = 4, number of rules used = 4, integrand size = 24, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.167, Rules used = {5082, 100, 143, 69} \[ \frac{2^{-1-\frac{i n}{2}} \left (2-n^2\right ) (1-i a x)^{1+\frac{i n}{2}} \, _2F_1\left (\frac{i n}{2}+1,\frac{i n}{2}+1;\frac{i n}{2}+2;\frac{1}{2} (1-i a x)\right )}{a^4 c (2+i n)}+\frac{i (1+i a x)^{-\frac{i n}{2}} \left (i a n^2 x-n^2-i n+2\right ) (1-i a x)^{\frac{i n}{2}}}{2 a^4 c n}+\frac{x^2 (1+i a x)^{-\frac{i n}{2}} (1-i a x)^{\frac{i n}{2}}}{2 a^2 c} \]
Warning: Unable to verify antiderivative.
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Rule 5082
Rule 100
Rule 143
Rule 69
Rubi steps
\begin{align*} \int \frac{e^{n \tan ^{-1}(a x)} x^3}{c+a^2 c x^2} \, dx &=\frac{\int x^3 (1-i a x)^{-1+\frac{i n}{2}} (1+i a x)^{-1-\frac{i n}{2}} \, dx}{c}\\ &=\frac{x^2 (1-i a x)^{\frac{i n}{2}} (1+i a x)^{-\frac{i n}{2}}}{2 a^2 c}+\frac{\int x (1-i a x)^{-1+\frac{i n}{2}} (1+i a x)^{-1-\frac{i n}{2}} (-2-a n x) \, dx}{2 a^2 c}\\ &=\frac{x^2 (1-i a x)^{\frac{i n}{2}} (1+i a x)^{-\frac{i n}{2}}}{2 a^2 c}+\frac{i (1-i a x)^{\frac{i n}{2}} (1+i a x)^{-\frac{i n}{2}} \left (2-i n-n^2+i a n^2 x\right )}{2 a^4 c n}-\frac{\left (i \left (2-n^2\right )\right ) \int (1-i a x)^{\frac{i n}{2}} (1+i a x)^{-1-\frac{i n}{2}} \, dx}{2 a^3 c}\\ &=\frac{x^2 (1-i a x)^{\frac{i n}{2}} (1+i a x)^{-\frac{i n}{2}}}{2 a^2 c}+\frac{i (1-i a x)^{\frac{i n}{2}} (1+i a x)^{-\frac{i n}{2}} \left (2-i n-n^2+i a n^2 x\right )}{2 a^4 c n}+\frac{2^{-1-\frac{i n}{2}} \left (2-n^2\right ) (1-i a x)^{1+\frac{i n}{2}} \, _2F_1\left (1+\frac{i n}{2},1+\frac{i n}{2};2+\frac{i n}{2};\frac{1}{2} (1-i a x)\right )}{a^4 c (2+i n)}\\ \end{align*}
Mathematica [A] time = 0.113165, size = 141, normalized size = 1.08 \[ \frac{(1-i a x)^{\frac{i n}{2}} \left (\frac{\left (a^2 n x^2+n^2 (-(a x+i))+n+2 i\right ) (1+i a x)^{-\frac{i n}{2}}}{n}+\frac{2^{-\frac{i n}{2}} \left (n^2-2\right ) (a x+i) \, _2F_1\left (\frac{i n}{2}+1,\frac{i n}{2}+1;\frac{i n}{2}+2;\frac{1}{2} (1-i a x)\right )}{n-2 i}\right )}{2 a^4 c} \]
Warning: Unable to verify antiderivative.
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Maple [F] time = 0.266, size = 0, normalized size = 0. \begin{align*} \int{\frac{{{\rm e}^{n\arctan \left ( ax \right ) }}{x}^{3}}{{a}^{2}c{x}^{2}+c}}\, 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{x^{3} e^{\left (n \arctan \left (a x\right )\right )}}{a^{2} c x^{2} + c}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [F] time = 0., size = 0, normalized size = 0. \begin{align*}{\rm integral}\left (\frac{x^{3} e^{\left (n \arctan \left (a x\right )\right )}}{a^{2} c x^{2} + c}, x\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*} \frac{\int \frac{x^{3} e^{n \operatorname{atan}{\left (a x \right )}}}{a^{2} x^{2} + 1}\, dx}{c} \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{x^{3} e^{\left (n \arctan \left (a x\right )\right )}}{a^{2} c x^{2} + c}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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