Integrand size = 16, antiderivative size = 54 \[ \int e^{2 i \arctan (a+b x)} x^2 \, dx=\frac {2 (1-i a) x}{b^2}+\frac {i x^2}{b}-\frac {x^3}{3}+\frac {2 i (i+a)^2 \log (i+a+b x)}{b^3} \]
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Time = 0.04 (sec) , antiderivative size = 54, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.125, Rules used = {5203, 78} \[ \int e^{2 i \arctan (a+b x)} x^2 \, dx=\frac {2 i (a+i)^2 \log (a+b x+i)}{b^3}+\frac {2 (1-i a) x}{b^2}+\frac {i x^2}{b}-\frac {x^3}{3} \]
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Rule 78
Rule 5203
Rubi steps \begin{align*} \text {integral}& = \int \frac {x^2 (1+i a+i b x)}{1-i a-i b x} \, dx \\ & = \int \left (-\frac {2 i (i+a)}{b^2}+\frac {2 i x}{b}-x^2+\frac {2 i (i+a)^2}{b^2 (i+a+b x)}\right ) \, dx \\ & = \frac {2 (1-i a) x}{b^2}+\frac {i x^2}{b}-\frac {x^3}{3}+\frac {2 i (i+a)^2 \log (i+a+b x)}{b^3} \\ \end{align*}
Time = 0.03 (sec) , antiderivative size = 54, normalized size of antiderivative = 1.00 \[ \int e^{2 i \arctan (a+b x)} x^2 \, dx=\frac {2 (1-i a) x}{b^2}+\frac {i x^2}{b}-\frac {x^3}{3}+\frac {2 i (i+a)^2 \log (i+a+b x)}{b^3} \]
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Time = 0.28 (sec) , antiderivative size = 70, normalized size of antiderivative = 1.30
method | result | size |
parallelrisch | \(\frac {-b^{3} x^{3}+3 i x^{2} b^{2}-12 \ln \left (b x +a +i\right ) a +6 i \ln \left (b x +a +i\right ) a^{2}-6 i a b x -6 i \ln \left (b x +a +i\right )+6 b x}{3 b^{3}}\) | \(70\) |
default | \(\frac {i \left (\frac {1}{3} i b^{2} x^{3}+x^{2} b -2 i x -2 a x \right )}{b^{2}}+\frac {\frac {\left (2 i a^{2} b -4 a b -2 i b \right ) \ln \left (b^{2} x^{2}+2 a b x +a^{2}+1\right )}{2 b^{2}}+\frac {\left (2 i a^{3}+2 i a -2 a^{2}-2-\frac {\left (2 i a^{2} b -4 a b -2 i b \right ) a}{b}\right ) \arctan \left (\frac {2 b^{2} x +2 a b}{2 b}\right )}{b}}{b^{2}}\) | \(135\) |
risch | \(-\frac {x^{3}}{3}+\frac {i x^{2}}{b}+\frac {2 x}{b^{2}}-\frac {2 i a x}{b^{2}}-\frac {2 \ln \left (b^{2} x^{2}+2 a b x +a^{2}+1\right ) a}{b^{3}}+\frac {i \ln \left (b^{2} x^{2}+2 a b x +a^{2}+1\right ) a^{2}}{b^{3}}-\frac {i \ln \left (b^{2} x^{2}+2 a b x +a^{2}+1\right )}{b^{3}}+\frac {4 i \arctan \left (b x +a \right ) a}{b^{3}}+\frac {2 \arctan \left (b x +a \right ) a^{2}}{b^{3}}-\frac {2 \arctan \left (b x +a \right )}{b^{3}}\) | \(143\) |
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Time = 0.25 (sec) , antiderivative size = 53, normalized size of antiderivative = 0.98 \[ \int e^{2 i \arctan (a+b x)} x^2 \, dx=-\frac {b^{3} x^{3} - 3 i \, b^{2} x^{2} + 6 \, {\left (i \, a - 1\right )} b x + 6 \, {\left (-i \, a^{2} + 2 \, a + i\right )} \log \left (\frac {b x + a + i}{b}\right )}{3 \, b^{3}} \]
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Time = 0.15 (sec) , antiderivative size = 46, normalized size of antiderivative = 0.85 \[ \int e^{2 i \arctan (a+b x)} x^2 \, dx=- \frac {x^{3}}{3} - x \left (\frac {2 i a}{b^{2}} - \frac {2}{b^{2}}\right ) + \frac {i x^{2}}{b} + \frac {2 i \left (a + i\right )^{2} \log {\left (a + b x + i \right )}}{b^{3}} \]
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Both result and optimal contain complex but leaf count of result is larger than twice the leaf count of optimal. 87 vs. \(2 (42) = 84\).
Time = 0.26 (sec) , antiderivative size = 87, normalized size of antiderivative = 1.61 \[ \int e^{2 i \arctan (a+b x)} x^2 \, dx=-\frac {b^{2} x^{3} - 3 i \, b x^{2} + 6 \, {\left (i \, a - 1\right )} x}{3 \, b^{2}} + \frac {2 \, {\left (a^{2} + 2 i \, a - 1\right )} \arctan \left (\frac {b^{2} x + a b}{b}\right )}{b^{3}} + \frac {{\left (i \, a^{2} - 2 \, a - i\right )} \log \left (b^{2} x^{2} + 2 \, a b x + a^{2} + 1\right )}{b^{3}} \]
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Time = 0.29 (sec) , antiderivative size = 53, normalized size of antiderivative = 0.98 \[ \int e^{2 i \arctan (a+b x)} x^2 \, dx=-\frac {2 \, {\left (-i \, a^{2} + 2 \, a + i\right )} \log \left (b x + a + i\right )}{b^{3}} - \frac {b^{3} x^{3} - 3 i \, b^{2} x^{2} + 6 i \, a b x - 6 \, b x}{3 \, b^{3}} \]
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Time = 0.57 (sec) , antiderivative size = 107, normalized size of antiderivative = 1.98 \[ \int e^{2 i \arctan (a+b x)} x^2 \, dx=-\ln \left (x+\frac {a+1{}\mathrm {i}}{b}\right )\,\left (\frac {4\,a}{b^3}-\frac {\left (2\,a^2-2\right )\,1{}\mathrm {i}}{b^3}\right )-x^2\,\left (\frac {\left (-1+a\,1{}\mathrm {i}\right )\,1{}\mathrm {i}}{2\,b}-\frac {\left (1+a\,1{}\mathrm {i}\right )\,1{}\mathrm {i}}{2\,b}\right )-\frac {x^3}{3}-\frac {x\,\left (-1+a\,1{}\mathrm {i}\right )\,\left (\frac {\left (-1+a\,1{}\mathrm {i}\right )\,1{}\mathrm {i}}{b}-\frac {\left (1+a\,1{}\mathrm {i}\right )\,1{}\mathrm {i}}{b}\right )\,1{}\mathrm {i}}{b} \]
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