Integrand size = 22, antiderivative size = 16 \[ \int \frac {x^2+2 \log (3 x)-2 \log ^2(3 x)}{x^3} \, dx=\log \left (5 e^{\frac {\log ^2(3 x)}{x^2}} x\right ) \]
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Time = 0.06 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.81, number of steps used = 5, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.136, Rules used = {14, 2341, 2342} \[ \int \frac {x^2+2 \log (3 x)-2 \log ^2(3 x)}{x^3} \, dx=\frac {\log ^2(3 x)}{x^2}+\log (x) \]
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Rule 14
Rule 2341
Rule 2342
Rubi steps \begin{align*} \text {integral}& = \int \left (\frac {1}{x}+\frac {2 \log (3 x)}{x^3}-\frac {2 \log ^2(3 x)}{x^3}\right ) \, dx \\ & = \log (x)+2 \int \frac {\log (3 x)}{x^3} \, dx-2 \int \frac {\log ^2(3 x)}{x^3} \, dx \\ & = -\frac {1}{2 x^2}+\log (x)-\frac {\log (3 x)}{x^2}+\frac {\log ^2(3 x)}{x^2}-2 \int \frac {\log (3 x)}{x^3} \, dx \\ & = \log (x)+\frac {\log ^2(3 x)}{x^2} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.81 \[ \int \frac {x^2+2 \log (3 x)-2 \log ^2(3 x)}{x^3} \, dx=\log (x)+\frac {\log ^2(3 x)}{x^2} \]
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Time = 0.02 (sec) , antiderivative size = 14, normalized size of antiderivative = 0.88
method | result | size |
risch | \(\frac {\ln \left (3 x \right )^{2}}{x^{2}}+\ln \left (x \right )\) | \(14\) |
parts | \(\frac {\ln \left (3 x \right )^{2}}{x^{2}}+\ln \left (x \right )\) | \(14\) |
derivativedivides | \(\frac {\ln \left (3 x \right )^{2}}{x^{2}}+\ln \left (3 x \right )\) | \(16\) |
default | \(\frac {\ln \left (3 x \right )^{2}}{x^{2}}+\ln \left (3 x \right )\) | \(16\) |
norman | \(\frac {\ln \left (3 x \right )^{2}+x^{2} \ln \left (3 x \right )}{x^{2}}\) | \(20\) |
parallelrisch | \(\frac {\ln \left (3 x \right )^{2}+x^{2} \ln \left (3 x \right )}{x^{2}}\) | \(20\) |
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none
Time = 0.25 (sec) , antiderivative size = 19, normalized size of antiderivative = 1.19 \[ \int \frac {x^2+2 \log (3 x)-2 \log ^2(3 x)}{x^3} \, dx=\frac {x^{2} \log \left (3 \, x\right ) + \log \left (3 \, x\right )^{2}}{x^{2}} \]
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Time = 0.05 (sec) , antiderivative size = 12, normalized size of antiderivative = 0.75 \[ \int \frac {x^2+2 \log (3 x)-2 \log ^2(3 x)}{x^3} \, dx=\log {\left (x \right )} + \frac {\log {\left (3 x \right )}^{2}}{x^{2}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 38 vs. \(2 (15) = 30\).
Time = 0.21 (sec) , antiderivative size = 38, normalized size of antiderivative = 2.38 \[ \int \frac {x^2+2 \log (3 x)-2 \log ^2(3 x)}{x^3} \, dx=\frac {2 \, \log \left (3 \, x\right )^{2} + 2 \, \log \left (3 \, x\right ) + 1}{2 \, x^{2}} - \frac {\log \left (3 \, x\right )}{x^{2}} - \frac {1}{2 \, x^{2}} + \log \left (x\right ) \]
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none
Time = 0.27 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.81 \[ \int \frac {x^2+2 \log (3 x)-2 \log ^2(3 x)}{x^3} \, dx=\frac {\log \left (3 \, x\right )^{2}}{x^{2}} + \log \left (x\right ) \]
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Time = 7.36 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.81 \[ \int \frac {x^2+2 \log (3 x)-2 \log ^2(3 x)}{x^3} \, dx=\ln \left (x\right )+\frac {{\ln \left (3\,x\right )}^2}{x^2} \]
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