Integrand size = 62, antiderivative size = 23 \[ \int \frac {-x^2+50 x^3+e^{4+2 x} (-1+50 x)+e^{2+x} \left (-1+3 x-100 x^2\right )}{e^{4+2 x}-2 e^{2+x} x+x^2} \, dx=2-x+25 x^2+\frac {x}{-e^{2+x}+x} \]
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\[ \int \frac {-x^2+50 x^3+e^{4+2 x} (-1+50 x)+e^{2+x} \left (-1+3 x-100 x^2\right )}{e^{4+2 x}-2 e^{2+x} x+x^2} \, dx=\int \frac {-x^2+50 x^3+e^{4+2 x} (-1+50 x)+e^{2+x} \left (-1+3 x-100 x^2\right )}{e^{4+2 x}-2 e^{2+x} x+x^2} \, dx \]
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Rubi steps \begin{align*} \text {integral}& = \int \frac {-x^2+50 x^3+e^{4+2 x} (-1+50 x)+e^{2+x} \left (-1+3 x-100 x^2\right )}{\left (e^{2+x}-x\right )^2} \, dx \\ & = \int \left (-1+\frac {-1+x}{e^{2+x}-x}+50 x+\frac {(-1+x) x}{\left (e^{2+x}-x\right )^2}\right ) \, dx \\ & = -x+25 x^2+\int \frac {-1+x}{e^{2+x}-x} \, dx+\int \frac {(-1+x) x}{\left (e^{2+x}-x\right )^2} \, dx \\ & = -x+25 x^2+\int \left (-\frac {1}{e^{2+x}-x}+\frac {x}{e^{2+x}-x}\right ) \, dx+\int \left (-\frac {x}{\left (e^{2+x}-x\right )^2}+\frac {x^2}{\left (e^{2+x}-x\right )^2}\right ) \, dx \\ & = -x+25 x^2-\int \frac {1}{e^{2+x}-x} \, dx-\int \frac {x}{\left (e^{2+x}-x\right )^2} \, dx+\int \frac {x}{e^{2+x}-x} \, dx+\int \frac {x^2}{\left (e^{2+x}-x\right )^2} \, dx \\ \end{align*}
Time = 1.34 (sec) , antiderivative size = 20, normalized size of antiderivative = 0.87 \[ \int \frac {-x^2+50 x^3+e^{4+2 x} (-1+50 x)+e^{2+x} \left (-1+3 x-100 x^2\right )}{e^{4+2 x}-2 e^{2+x} x+x^2} \, dx=x \left (-1-\frac {1}{e^{2+x}-x}+25 x\right ) \]
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Time = 0.08 (sec) , antiderivative size = 22, normalized size of antiderivative = 0.96
method | result | size |
risch | \(25 x^{2}-x +\frac {x}{x -{\mathrm e}^{2+x}}\) | \(22\) |
parallelrisch | \(\frac {25 x^{3}-25 x^{2} {\mathrm e}^{2+x}-x^{2}+x \,{\mathrm e}^{2+x}+x}{x -{\mathrm e}^{2+x}}\) | \(39\) |
norman | \(\frac {x \,{\mathrm e}^{2+x}+{\mathrm e}^{2+x}-x^{2}+25 x^{3}-25 x^{2} {\mathrm e}^{2+x}}{x -{\mathrm e}^{2+x}}\) | \(42\) |
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Time = 0.24 (sec) , antiderivative size = 38, normalized size of antiderivative = 1.65 \[ \int \frac {-x^2+50 x^3+e^{4+2 x} (-1+50 x)+e^{2+x} \left (-1+3 x-100 x^2\right )}{e^{4+2 x}-2 e^{2+x} x+x^2} \, dx=\frac {25 \, x^{3} - x^{2} - {\left (25 \, x^{2} - x\right )} e^{\left (x + 2\right )} + x}{x - e^{\left (x + 2\right )}} \]
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Time = 0.06 (sec) , antiderivative size = 14, normalized size of antiderivative = 0.61 \[ \int \frac {-x^2+50 x^3+e^{4+2 x} (-1+50 x)+e^{2+x} \left (-1+3 x-100 x^2\right )}{e^{4+2 x}-2 e^{2+x} x+x^2} \, dx=25 x^{2} - x - \frac {x}{- x + e^{x + 2}} \]
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Time = 0.24 (sec) , antiderivative size = 40, normalized size of antiderivative = 1.74 \[ \int \frac {-x^2+50 x^3+e^{4+2 x} (-1+50 x)+e^{2+x} \left (-1+3 x-100 x^2\right )}{e^{4+2 x}-2 e^{2+x} x+x^2} \, dx=\frac {25 \, x^{3} - x^{2} - {\left (25 \, x^{2} e^{2} - x e^{2}\right )} e^{x} + x}{x - e^{\left (x + 2\right )}} \]
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Time = 0.26 (sec) , antiderivative size = 38, normalized size of antiderivative = 1.65 \[ \int \frac {-x^2+50 x^3+e^{4+2 x} (-1+50 x)+e^{2+x} \left (-1+3 x-100 x^2\right )}{e^{4+2 x}-2 e^{2+x} x+x^2} \, dx=\frac {25 \, x^{3} - 25 \, x^{2} e^{\left (x + 2\right )} - x^{2} + x e^{\left (x + 2\right )} + x}{x - e^{\left (x + 2\right )}} \]
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Time = 13.13 (sec) , antiderivative size = 24, normalized size of antiderivative = 1.04 \[ \int \frac {-x^2+50 x^3+e^{4+2 x} (-1+50 x)+e^{2+x} \left (-1+3 x-100 x^2\right )}{e^{4+2 x}-2 e^{2+x} x+x^2} \, dx=\frac {{\mathrm {e}}^{x+2}}{x-{\mathrm {e}}^{x+2}}-x+25\,x^2 \]
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