Integrand size = 36, antiderivative size = 24 \[ \int e^{-4+2 x-2 x^2-\frac {4 (4+x)}{x}} \left (16+2 x+2 x^2-4 x^3\right ) \, dx=e^{-4+2 x-2 x^2-\frac {4 (4+x)}{x}} x^2 \]
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Leaf count is larger than twice the leaf count of optimal. \(51\) vs. \(2(24)=48\).
Time = 0.03 (sec) , antiderivative size = 51, normalized size of antiderivative = 2.12, number of steps used = 1, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.028, Rules used = {2326} \[ \int e^{-4+2 x-2 x^2-\frac {4 (4+x)}{x}} \left (16+2 x+2 x^2-4 x^3\right ) \, dx=\frac {e^{-2 x^2+2 x-\frac {4 (x+4)}{x}-4} \left (-2 x^3+x^2+8\right )}{\frac {2 (x+4)}{x^2}-2 x-\frac {2}{x}+1} \]
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Rule 2326
Rubi steps \begin{align*} \text {integral}& = \frac {e^{-4+2 x-2 x^2-\frac {4 (4+x)}{x}} \left (8+x^2-2 x^3\right )}{1-\frac {2}{x}-2 x+\frac {2 (4+x)}{x^2}} \\ \end{align*}
Time = 0.03 (sec) , antiderivative size = 21, normalized size of antiderivative = 0.88 \[ \int e^{-4+2 x-2 x^2-\frac {4 (4+x)}{x}} \left (16+2 x+2 x^2-4 x^3\right ) \, dx=e^{-2 \left (4+\frac {8}{x}-x+x^2\right )} x^2 \]
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Time = 1.12 (sec) , antiderivative size = 24, normalized size of antiderivative = 1.00
method | result | size |
risch | \(x^{2} {\mathrm e}^{-\frac {2 \left (x^{3}-x^{2}+4 x +8\right )}{x}}\) | \(24\) |
gosper | \(x^{2} {\mathrm e}^{-\frac {4 \left (4+x \right )}{x}} {\mathrm e}^{-2 x^{2}+2 x -4}\) | \(26\) |
parallelrisch | \(x^{2} {\mathrm e}^{-\frac {4 \left (4+x \right )}{x}} {\mathrm e}^{-2 x^{2}+2 x -4}\) | \(26\) |
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none
Time = 0.28 (sec) , antiderivative size = 23, normalized size of antiderivative = 0.96 \[ \int e^{-4+2 x-2 x^2-\frac {4 (4+x)}{x}} \left (16+2 x+2 x^2-4 x^3\right ) \, dx=x^{2} e^{\left (-\frac {2 \, {\left (x^{3} - x^{2} + 4 \, x + 8\right )}}{x}\right )} \]
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Time = 0.52 (sec) , antiderivative size = 22, normalized size of antiderivative = 0.92 \[ \int e^{-4+2 x-2 x^2-\frac {4 (4+x)}{x}} \left (16+2 x+2 x^2-4 x^3\right ) \, dx=x^{2} e^{- \frac {4 \left (x + 4\right )}{x}} e^{- 2 x^{2} + 2 x - 4} \]
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none
Time = 0.26 (sec) , antiderivative size = 20, normalized size of antiderivative = 0.83 \[ \int e^{-4+2 x-2 x^2-\frac {4 (4+x)}{x}} \left (16+2 x+2 x^2-4 x^3\right ) \, dx=x^{2} e^{\left (-2 \, x^{2} + 2 \, x - \frac {16}{x} - 8\right )} \]
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none
Time = 0.27 (sec) , antiderivative size = 23, normalized size of antiderivative = 0.96 \[ \int e^{-4+2 x-2 x^2-\frac {4 (4+x)}{x}} \left (16+2 x+2 x^2-4 x^3\right ) \, dx=x^{2} e^{\left (-\frac {2 \, {\left (x^{3} - x^{2} + 4 \, x + 8\right )}}{x}\right )} \]
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Time = 15.61 (sec) , antiderivative size = 22, normalized size of antiderivative = 0.92 \[ \int e^{-4+2 x-2 x^2-\frac {4 (4+x)}{x}} \left (16+2 x+2 x^2-4 x^3\right ) \, dx=x^2\,{\mathrm {e}}^{2\,x}\,{\mathrm {e}}^{-8}\,{\mathrm {e}}^{-2\,x^2}\,{\mathrm {e}}^{-\frac {16}{x}} \]
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