Integrand size = 22, antiderivative size = 25 \[ \int e^{-x} \left (-3 x^2+x^3-e^x \log (4)\right ) \, dx=2-\log \left (\frac {5}{4}\right )+x \left (-e^{-x} x^2-\log (4)\right ) \]
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Time = 0.08 (sec) , antiderivative size = 16, normalized size of antiderivative = 0.64, number of steps used = 9, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.136, Rules used = {6874, 2207, 2225} \[ \int e^{-x} \left (-3 x^2+x^3-e^x \log (4)\right ) \, dx=-e^{-x} x^3-x \log (4) \]
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Rule 2207
Rule 2225
Rule 6874
Rubi steps \begin{align*} \text {integral}& = \int \left (-3 e^{-x} x^2+e^{-x} x^3-\log (4)\right ) \, dx \\ & = -x \log (4)-3 \int e^{-x} x^2 \, dx+\int e^{-x} x^3 \, dx \\ & = 3 e^{-x} x^2-e^{-x} x^3-x \log (4)+3 \int e^{-x} x^2 \, dx-6 \int e^{-x} x \, dx \\ & = 6 e^{-x} x-e^{-x} x^3-x \log (4)-6 \int e^{-x} \, dx+6 \int e^{-x} x \, dx \\ & = 6 e^{-x}-e^{-x} x^3-x \log (4)+6 \int e^{-x} \, dx \\ & = -e^{-x} x^3-x \log (4) \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 16, normalized size of antiderivative = 0.64 \[ \int e^{-x} \left (-3 x^2+x^3-e^x \log (4)\right ) \, dx=-e^{-x} x^3-x \log (4) \]
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Time = 0.09 (sec) , antiderivative size = 16, normalized size of antiderivative = 0.64
method | result | size |
default | \(-x^{3} {\mathrm e}^{-x}-2 x \ln \left (2\right )\) | \(16\) |
risch | \(-x^{3} {\mathrm e}^{-x}-2 x \ln \left (2\right )\) | \(16\) |
parts | \(-x^{3} {\mathrm e}^{-x}-2 x \ln \left (2\right )\) | \(16\) |
parallelrisch | \(-\left (2 x \ln \left (2\right ) {\mathrm e}^{x}+x^{3}\right ) {\mathrm e}^{-x}\) | \(18\) |
norman | \(\left (-x^{3}-2 x \ln \left (2\right ) {\mathrm e}^{x}\right ) {\mathrm e}^{-x}\) | \(19\) |
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Time = 0.25 (sec) , antiderivative size = 17, normalized size of antiderivative = 0.68 \[ \int e^{-x} \left (-3 x^2+x^3-e^x \log (4)\right ) \, dx=-{\left (x^{3} + 2 \, x e^{x} \log \left (2\right )\right )} e^{\left (-x\right )} \]
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Time = 0.04 (sec) , antiderivative size = 14, normalized size of antiderivative = 0.56 \[ \int e^{-x} \left (-3 x^2+x^3-e^x \log (4)\right ) \, dx=- x^{3} e^{- x} - 2 x \log {\left (2 \right )} \]
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Time = 0.19 (sec) , antiderivative size = 39, normalized size of antiderivative = 1.56 \[ \int e^{-x} \left (-3 x^2+x^3-e^x \log (4)\right ) \, dx=-{\left (x^{3} + 3 \, x^{2} + 6 \, x + 6\right )} e^{\left (-x\right )} + 3 \, {\left (x^{2} + 2 \, x + 2\right )} e^{\left (-x\right )} - 2 \, x \log \left (2\right ) \]
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Time = 0.25 (sec) , antiderivative size = 15, normalized size of antiderivative = 0.60 \[ \int e^{-x} \left (-3 x^2+x^3-e^x \log (4)\right ) \, dx=-x^{3} e^{\left (-x\right )} - 2 \, x \log \left (2\right ) \]
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Time = 13.81 (sec) , antiderivative size = 15, normalized size of antiderivative = 0.60 \[ \int e^{-x} \left (-3 x^2+x^3-e^x \log (4)\right ) \, dx=-2\,x\,\ln \left (2\right )-x^3\,{\mathrm {e}}^{-x} \]
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