Integrand size = 31, antiderivative size = 20 \[ \int \frac {-5-4 x^2}{5 x+80 x^2-4 x^3+6 x^2 \log (2)} \, dx=\log \left (x-4 \left (5+\frac {5}{16 x}+\frac {3 \log (2)}{8}\right )\right ) \]
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Time = 0.05 (sec) , antiderivative size = 19, normalized size of antiderivative = 0.95, number of steps used = 5, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.129, Rules used = {6, 1608, 1642, 642} \[ \int \frac {-5-4 x^2}{5 x+80 x^2-4 x^3+6 x^2 \log (2)} \, dx=\log \left (-4 x^2+x (80+\log (64))+5\right )-\log (x) \]
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Rule 6
Rule 642
Rule 1608
Rule 1642
Rubi steps \begin{align*} \text {integral}& = \int \frac {-5-4 x^2}{5 x-4 x^3+x^2 (80+6 \log (2))} \, dx \\ & = \int \frac {-5-4 x^2}{x \left (5-4 x^2+x (80+6 \log (2))\right )} \, dx \\ & = \int \left (-\frac {1}{x}+\frac {80-8 x+\log (64)}{5-4 x^2+x (80+\log (64))}\right ) \, dx \\ & = -\log (x)+\int \frac {80-8 x+\log (64)}{5-4 x^2+x (80+\log (64))} \, dx \\ & = -\log (x)+\log \left (5-4 x^2+x (80+\log (64))\right ) \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.05 \[ \int \frac {-5-4 x^2}{5 x+80 x^2-4 x^3+6 x^2 \log (2)} \, dx=-\log (x)+\log \left (5+80 x-4 x^2+2 x \log (8)\right ) \]
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Time = 0.03 (sec) , antiderivative size = 20, normalized size of antiderivative = 1.00
method | result | size |
parallelrisch | \(-\ln \left (x \right )+\ln \left (-\frac {3 x \ln \left (2\right )}{2}+x^{2}-20 x -\frac {5}{4}\right )\) | \(20\) |
default | \(-\ln \left (x \right )+\ln \left (-6 x \ln \left (2\right )+4 x^{2}-80 x -5\right )\) | \(22\) |
norman | \(-\ln \left (x \right )+\ln \left (6 x \ln \left (2\right )-4 x^{2}+80 x +5\right )\) | \(22\) |
risch | \(-\ln \left (-x \right )+\ln \left (-5+4 x^{2}+\left (-6 \ln \left (2\right )-80\right ) x \right )\) | \(24\) |
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Time = 0.24 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.05 \[ \int \frac {-5-4 x^2}{5 x+80 x^2-4 x^3+6 x^2 \log (2)} \, dx=\log \left (4 \, x^{2} - 6 \, x \log \left (2\right ) - 80 \, x - 5\right ) - \log \left (x\right ) \]
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Time = 0.19 (sec) , antiderivative size = 22, normalized size of antiderivative = 1.10 \[ \int \frac {-5-4 x^2}{5 x+80 x^2-4 x^3+6 x^2 \log (2)} \, dx=- \log {\left (x \right )} + \log {\left (x^{2} + x \left (-20 - \frac {3 \log {\left (2 \right )}}{2}\right ) - \frac {5}{4} \right )} \]
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Time = 0.19 (sec) , antiderivative size = 22, normalized size of antiderivative = 1.10 \[ \int \frac {-5-4 x^2}{5 x+80 x^2-4 x^3+6 x^2 \log (2)} \, dx=\log \left (4 \, x^{2} - 2 \, x {\left (3 \, \log \left (2\right ) + 40\right )} - 5\right ) - \log \left (x\right ) \]
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Time = 0.29 (sec) , antiderivative size = 23, normalized size of antiderivative = 1.15 \[ \int \frac {-5-4 x^2}{5 x+80 x^2-4 x^3+6 x^2 \log (2)} \, dx=\log \left ({\left | 4 \, x^{2} - 6 \, x \log \left (2\right ) - 80 \, x - 5 \right |}\right ) - \log \left ({\left | x \right |}\right ) \]
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Time = 0.23 (sec) , antiderivative size = 19, normalized size of antiderivative = 0.95 \[ \int \frac {-5-4 x^2}{5 x+80 x^2-4 x^3+6 x^2 \log (2)} \, dx=\ln \left (x^2-\frac {3\,x\,\ln \left (2\right )}{2}-20\,x-\frac {5}{4}\right )-\ln \left (x\right ) \]
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