Integrand size = 25, antiderivative size = 16 \[ \int \frac {e^4 \left (2 x+3 x^2\right )}{1+6 x+9 x^2} \, dx=e \left (3+\frac {e^3 x}{3+\frac {1}{x}}\right ) \]
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Time = 0.01 (sec) , antiderivative size = 23, normalized size of antiderivative = 1.44, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.120, Rules used = {12, 27, 697} \[ \int \frac {e^4 \left (2 x+3 x^2\right )}{1+6 x+9 x^2} \, dx=\frac {e^4 x}{3}+\frac {e^4}{9 (3 x+1)} \]
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Rule 12
Rule 27
Rule 697
Rubi steps \begin{align*} \text {integral}& = e^4 \int \frac {2 x+3 x^2}{1+6 x+9 x^2} \, dx \\ & = e^4 \int \frac {2 x+3 x^2}{(1+3 x)^2} \, dx \\ & = e^4 \int \left (\frac {1}{3}-\frac {1}{3 (1+3 x)^2}\right ) \, dx \\ & = \frac {e^4 x}{3}+\frac {e^4}{9 (1+3 x)} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.31 \[ \int \frac {e^4 \left (2 x+3 x^2\right )}{1+6 x+9 x^2} \, dx=\frac {e^4 \left (2+6 x+9 x^2\right )}{9+27 x} \]
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Time = 0.42 (sec) , antiderivative size = 14, normalized size of antiderivative = 0.88
method | result | size |
gosper | \(\frac {x^{2} {\mathrm e}^{4}}{1+3 x}\) | \(14\) |
norman | \(\frac {x^{2} {\mathrm e}^{3} {\mathrm e}}{1+3 x}\) | \(16\) |
risch | \(\frac {x \,{\mathrm e}^{4}}{3}+\frac {{\mathrm e}^{4}}{27 x +9}\) | \(16\) |
parallelrisch | \(\frac {x^{2} {\mathrm e}^{3} {\mathrm e}}{1+3 x}\) | \(16\) |
default | \({\mathrm e} \,{\mathrm e}^{3} \left (\frac {x}{3}+\frac {1}{27 x +9}\right )\) | \(19\) |
meijerg | \(\frac {{\mathrm e}^{4} \left (\frac {x \left (9 x +6\right )}{1+3 x}-2 \ln \left (1+3 x \right )\right )}{9}+\frac {2 \,{\mathrm e}^{4} \left (-\frac {3 x}{1+3 x}+\ln \left (1+3 x \right )\right )}{9}\) | \(50\) |
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Time = 0.24 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.31 \[ \int \frac {e^4 \left (2 x+3 x^2\right )}{1+6 x+9 x^2} \, dx=\frac {{\left (9 \, x^{2} + 3 \, x + 1\right )} e^{4}}{9 \, {\left (3 \, x + 1\right )}} \]
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Time = 0.05 (sec) , antiderivative size = 14, normalized size of antiderivative = 0.88 \[ \int \frac {e^4 \left (2 x+3 x^2\right )}{1+6 x+9 x^2} \, dx=\frac {x e^{4}}{3} + \frac {e^{4}}{27 x + 9} \]
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Time = 0.19 (sec) , antiderivative size = 15, normalized size of antiderivative = 0.94 \[ \int \frac {e^4 \left (2 x+3 x^2\right )}{1+6 x+9 x^2} \, dx=\frac {1}{9} \, {\left (3 \, x + \frac {1}{3 \, x + 1}\right )} e^{4} \]
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Time = 0.25 (sec) , antiderivative size = 15, normalized size of antiderivative = 0.94 \[ \int \frac {e^4 \left (2 x+3 x^2\right )}{1+6 x+9 x^2} \, dx=\frac {1}{9} \, {\left (3 \, x + \frac {1}{3 \, x + 1}\right )} e^{4} \]
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Time = 7.89 (sec) , antiderivative size = 16, normalized size of antiderivative = 1.00 \[ \int \frac {e^4 \left (2 x+3 x^2\right )}{1+6 x+9 x^2} \, dx=\frac {x\,{\mathrm {e}}^4}{3}+\frac {{\mathrm {e}}^4}{9\,\left (3\,x+1\right )} \]
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