Integrand size = 17, antiderivative size = 14 \[ \int \frac {-2916-3240 e^4 x^2}{e^8 x^5} \, dx=9 \left (10+\frac {9}{e^4 x^2}\right )^2 \]
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Time = 0.01 (sec) , antiderivative size = 17, normalized size of antiderivative = 1.21, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.118, Rules used = {12, 14} \[ \int \frac {-2916-3240 e^4 x^2}{e^8 x^5} \, dx=\frac {729}{e^8 x^4}+\frac {1620}{e^4 x^2} \]
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Rule 12
Rule 14
Rubi steps \begin{align*} \text {integral}& = \frac {\int \frac {-2916-3240 e^4 x^2}{x^5} \, dx}{e^8} \\ & = \frac {\int \left (-\frac {2916}{x^5}-\frac {3240 e^4}{x^3}\right ) \, dx}{e^8} \\ & = \frac {729}{e^8 x^4}+\frac {1620}{e^4 x^2} \\ \end{align*}
Time = 0.00 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.50 \[ \int \frac {-2916-3240 e^4 x^2}{e^8 x^5} \, dx=-\frac {324 \left (-\frac {9}{4 x^4}-\frac {5 e^4}{x^2}\right )}{e^8} \]
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Time = 0.02 (sec) , antiderivative size = 16, normalized size of antiderivative = 1.14
method | result | size |
risch | \(\frac {{\mathrm e}^{-8} \left (1620 x^{2} {\mathrm e}^{4}+729\right )}{x^{4}}\) | \(16\) |
default | \(324 \,{\mathrm e}^{-8} \left (\frac {9}{4 x^{4}}+\frac {5 \,{\mathrm e}^{4}}{x^{2}}\right )\) | \(20\) |
parallelrisch | \(\frac {{\mathrm e}^{-8} \left (1620 x^{2} {\mathrm e}^{4}+729\right )}{x^{4}}\) | \(20\) |
gosper | \(\frac {81 \left (20 x^{2} {\mathrm e}^{4}+9\right ) {\mathrm e}^{-8}}{x^{4}}\) | \(21\) |
norman | \(\frac {\left (729 \,{\mathrm e}^{-2}+1620 x^{2} {\mathrm e}^{2}\right ) {\mathrm e}^{-6}}{x^{4}}\) | \(23\) |
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Time = 0.24 (sec) , antiderivative size = 16, normalized size of antiderivative = 1.14 \[ \int \frac {-2916-3240 e^4 x^2}{e^8 x^5} \, dx=\frac {81 \, {\left (20 \, x^{2} e^{4} + 9\right )} e^{\left (-8\right )}}{x^{4}} \]
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Time = 0.06 (sec) , antiderivative size = 19, normalized size of antiderivative = 1.36 \[ \int \frac {-2916-3240 e^4 x^2}{e^8 x^5} \, dx=- \frac {- 1620 x^{2} e^{4} - 729}{x^{4} e^{8}} \]
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Time = 0.19 (sec) , antiderivative size = 16, normalized size of antiderivative = 1.14 \[ \int \frac {-2916-3240 e^4 x^2}{e^8 x^5} \, dx=\frac {81 \, {\left (20 \, x^{2} e^{4} + 9\right )} e^{\left (-8\right )}}{x^{4}} \]
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Time = 0.26 (sec) , antiderivative size = 16, normalized size of antiderivative = 1.14 \[ \int \frac {-2916-3240 e^4 x^2}{e^8 x^5} \, dx=\frac {81 \, {\left (20 \, x^{2} e^{4} + 9\right )} e^{\left (-8\right )}}{x^{4}} \]
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Time = 0.05 (sec) , antiderivative size = 15, normalized size of antiderivative = 1.07 \[ \int \frac {-2916-3240 e^4 x^2}{e^8 x^5} \, dx=\frac {{\mathrm {e}}^{-8}\,\left (1620\,{\mathrm {e}}^4\,x^2+729\right )}{x^4} \]
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