Optimal. Leaf size=72 \[ -\frac {2 (1-i a)^3 \log (a+b x+i)}{b^4}+\frac {2 i (a+i)^2 x}{b^3}+\frac {(1-i a) x^2}{b^2}+\frac {2 i x^3}{3 b}-\frac {x^4}{4} \]
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Rubi [A] time = 0.06, antiderivative size = 72, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, integrand size = 16, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.125, Rules used = {5095, 77} \[ \frac {(1-i a) x^2}{b^2}+\frac {2 i (a+i)^2 x}{b^3}-\frac {2 (1-i a)^3 \log (a+b x+i)}{b^4}+\frac {2 i x^3}{3 b}-\frac {x^4}{4} \]
Antiderivative was successfully verified.
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Rule 77
Rule 5095
Rubi steps
\begin {align*} \int e^{2 i \tan ^{-1}(a+b x)} x^3 \, dx &=\int \frac {x^3 (1+i a+i b x)}{1-i a-i b x} \, dx\\ &=\int \left (\frac {2 i (i+a)^2}{b^3}+\frac {2 (1-i a) x}{b^2}+\frac {2 i x^2}{b}-x^3+\frac {2 (-1+i a)^3}{b^3 (i+a+b x)}\right ) \, dx\\ &=\frac {2 i (i+a)^2 x}{b^3}+\frac {(1-i a) x^2}{b^2}+\frac {2 i x^3}{3 b}-\frac {x^4}{4}-\frac {2 (1-i a)^3 \log (i+a+b x)}{b^4}\\ \end {align*}
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Mathematica [A] time = 0.07, size = 72, normalized size = 1.00 \[ -\frac {2 (1-i a)^3 \log (a+b x+i)}{b^4}+\frac {2 i (a+i)^2 x}{b^3}+\frac {(1-i a) x^2}{b^2}+\frac {2 i x^3}{3 b}-\frac {x^4}{4} \]
Antiderivative was successfully verified.
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fricas [A] time = 0.47, size = 77, normalized size = 1.07 \[ -\frac {3 \, b^{4} x^{4} - 8 i \, b^{3} x^{3} + 12 \, {\left (i \, a - 1\right )} b^{2} x^{2} - {\left (24 i \, a^{2} - 48 \, a - 24 i\right )} b x - {\left (-24 i \, a^{3} + 72 \, a^{2} + 72 i \, a - 24\right )} \log \left (\frac {b x + a + i}{b}\right )}{12 \, b^{4}} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 0.13, size = 88, normalized size = 1.22 \[ -\frac {2 \, {\left (a^{3} i - 3 \, a^{2} - 3 \, a i + 1\right )} \log \left (b x + a + i\right )}{b^{4}} - \frac {3 \, b^{4} x^{4} - 8 \, b^{3} i x^{3} + 12 \, a b^{2} i x^{2} - 24 \, a^{2} b i x - 12 \, b^{2} x^{2} + 48 \, a b x + 24 \, b i x}{12 \, b^{4}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [B] time = 0.04, size = 255, normalized size = 3.54 \[ -\frac {x^{4}}{4}+\frac {2 i x^{3}}{3 b}-\frac {i x^{2} a}{b^{2}}+\frac {2 i a^{2} x}{b^{3}}+\frac {x^{2}}{b^{2}}-\frac {2 i x}{b^{3}}-\frac {4 a x}{b^{3}}-\frac {i \ln \left (b^{2} x^{2}+2 a b x +a^{2}+1\right ) a^{3}}{b^{4}}+\frac {3 i \ln \left (b^{2} x^{2}+2 a b x +a^{2}+1\right ) a}{b^{4}}+\frac {3 \ln \left (b^{2} x^{2}+2 a b x +a^{2}+1\right ) a^{2}}{b^{4}}-\frac {\ln \left (b^{2} x^{2}+2 a b x +a^{2}+1\right )}{b^{4}}-\frac {6 i \arctan \left (\frac {2 b^{2} x +2 a b}{2 b}\right ) a^{2}}{b^{4}}-\frac {2 \arctan \left (\frac {2 b^{2} x +2 a b}{2 b}\right ) a^{3}}{b^{4}}+\frac {2 i \arctan \left (\frac {2 b^{2} x +2 a b}{2 b}\right )}{b^{4}}+\frac {6 \arctan \left (\frac {2 b^{2} x +2 a b}{2 b}\right ) a}{b^{4}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [B] time = 0.43, size = 118, normalized size = 1.64 \[ -\frac {3 \, b^{3} x^{4} - 8 i \, b^{2} x^{3} + 12 \, {\left (i \, a - 1\right )} b x^{2} - {\left (24 i \, a^{2} - 48 \, a - 24 i\right )} x}{12 \, b^{3}} - \frac {{\left (2 \, a^{3} + 6 i \, a^{2} - 6 \, a - 2 i\right )} \arctan \left (\frac {b^{2} x + a b}{b}\right )}{b^{4}} + \frac {{\left (-i \, a^{3} + 3 \, a^{2} + 3 i \, a - 1\right )} \log \left (b^{2} x^{2} + 2 \, a b x + a^{2} + 1\right )}{b^{4}} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 0.53, size = 153, normalized size = 2.12 \[ -x^3\,\left (\frac {\left (-1+a\,1{}\mathrm {i}\right )\,1{}\mathrm {i}}{3\,b}-\frac {\left (1+a\,1{}\mathrm {i}\right )\,1{}\mathrm {i}}{3\,b}\right )-\frac {x^4}{4}+\ln \left (x+\frac {a+1{}\mathrm {i}}{b}\right )\,\left (\frac {6\,a^2-2}{b^4}+\frac {\left (6\,a-2\,a^3\right )\,1{}\mathrm {i}}{b^4}\right )-\frac {x^2\,\left (-1+a\,1{}\mathrm {i}\right )\,\left (\frac {\left (-1+a\,1{}\mathrm {i}\right )\,1{}\mathrm {i}}{b}-\frac {\left (1+a\,1{}\mathrm {i}\right )\,1{}\mathrm {i}}{b}\right )\,1{}\mathrm {i}}{2\,b}+\frac {x\,{\left (-1+a\,1{}\mathrm {i}\right )}^2\,\left (\frac {\left (-1+a\,1{}\mathrm {i}\right )\,1{}\mathrm {i}}{b}-\frac {\left (1+a\,1{}\mathrm {i}\right )\,1{}\mathrm {i}}{b}\right )}{b^2} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [A] time = 0.38, size = 78, normalized size = 1.08 \[ - \frac {x^{4}}{4} - x^{2} \left (\frac {i a}{b^{2}} - \frac {1}{b^{2}}\right ) - x \left (- \frac {2 i a^{2}}{b^{3}} + \frac {4 a}{b^{3}} + \frac {2 i}{b^{3}}\right ) + \frac {2 i x^{3}}{3 b} - \frac {2 i \left (a + i\right )^{3} \log {\left (i a + i b x - 1 \right )}}{b^{4}} \]
Verification of antiderivative is not currently implemented for this CAS.
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