Integrand size = 16, antiderivative size = 21 \[ \int \frac {x^3}{2+3 x^4+x^8} \, dx=\frac {1}{4} \log \left (1+x^4\right )-\frac {1}{4} \log \left (2+x^4\right ) \]
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Time = 0.01 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.188, Rules used = {1366, 630, 31} \[ \int \frac {x^3}{2+3 x^4+x^8} \, dx=\frac {1}{4} \log \left (x^4+1\right )-\frac {1}{4} \log \left (x^4+2\right ) \]
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Rule 31
Rule 630
Rule 1366
Rubi steps \begin{align*} \text {integral}& = \frac {1}{4} \text {Subst}\left (\int \frac {1}{2+3 x+x^2} \, dx,x,x^4\right ) \\ & = \frac {1}{4} \text {Subst}\left (\int \frac {1}{1+x} \, dx,x,x^4\right )-\frac {1}{4} \text {Subst}\left (\int \frac {1}{2+x} \, dx,x,x^4\right ) \\ & = \frac {1}{4} \log \left (1+x^4\right )-\frac {1}{4} \log \left (2+x^4\right ) \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.00 \[ \int \frac {x^3}{2+3 x^4+x^8} \, dx=\frac {1}{4} \log \left (1+x^4\right )-\frac {1}{4} \log \left (2+x^4\right ) \]
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Time = 0.05 (sec) , antiderivative size = 18, normalized size of antiderivative = 0.86
method | result | size |
default | \(\frac {\ln \left (x^{4}+1\right )}{4}-\frac {\ln \left (x^{4}+2\right )}{4}\) | \(18\) |
norman | \(\frac {\ln \left (x^{4}+1\right )}{4}-\frac {\ln \left (x^{4}+2\right )}{4}\) | \(18\) |
risch | \(\frac {\ln \left (x^{4}+1\right )}{4}-\frac {\ln \left (x^{4}+2\right )}{4}\) | \(18\) |
parallelrisch | \(\frac {\ln \left (x^{4}+1\right )}{4}-\frac {\ln \left (x^{4}+2\right )}{4}\) | \(18\) |
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none
Time = 0.25 (sec) , antiderivative size = 17, normalized size of antiderivative = 0.81 \[ \int \frac {x^3}{2+3 x^4+x^8} \, dx=-\frac {1}{4} \, \log \left (x^{4} + 2\right ) + \frac {1}{4} \, \log \left (x^{4} + 1\right ) \]
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Time = 0.05 (sec) , antiderivative size = 15, normalized size of antiderivative = 0.71 \[ \int \frac {x^3}{2+3 x^4+x^8} \, dx=\frac {\log {\left (x^{4} + 1 \right )}}{4} - \frac {\log {\left (x^{4} + 2 \right )}}{4} \]
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none
Time = 0.18 (sec) , antiderivative size = 17, normalized size of antiderivative = 0.81 \[ \int \frac {x^3}{2+3 x^4+x^8} \, dx=-\frac {1}{4} \, \log \left (x^{4} + 2\right ) + \frac {1}{4} \, \log \left (x^{4} + 1\right ) \]
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none
Time = 0.30 (sec) , antiderivative size = 17, normalized size of antiderivative = 0.81 \[ \int \frac {x^3}{2+3 x^4+x^8} \, dx=-\frac {1}{4} \, \log \left (x^{4} + 2\right ) + \frac {1}{4} \, \log \left (x^{4} + 1\right ) \]
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Time = 0.04 (sec) , antiderivative size = 16, normalized size of antiderivative = 0.76 \[ \int \frac {x^3}{2+3 x^4+x^8} \, dx=-\frac {\mathrm {atanh}\left (\frac {256}{9\,\left (144\,x^4+160\right )}-\frac {7}{9}\right )}{2} \]
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