Integrand size = 25, antiderivative size = 96 \[ \int \frac {x}{1+2 f^{c+d x}+f^{2 c+2 d x}} \, dx=\frac {x^2}{2}-\frac {x}{d \log (f)}+\frac {x}{d \left (1+f^{c+d x}\right ) \log (f)}+\frac {\log \left (1+f^{c+d x}\right )}{d^2 \log ^2(f)}-\frac {x \log \left (1+f^{c+d x}\right )}{d \log (f)}-\frac {\operatorname {PolyLog}\left (2,-f^{c+d x}\right )}{d^2 \log ^2(f)} \]
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Time = 0.15 (sec) , antiderivative size = 96, normalized size of antiderivative = 1.00, number of steps used = 11, number of rules used = 11, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.440, Rules used = {6820, 2216, 2215, 2221, 2317, 2438, 2222, 2320, 36, 29, 31} \[ \int \frac {x}{1+2 f^{c+d x}+f^{2 c+2 d x}} \, dx=-\frac {\operatorname {PolyLog}\left (2,-f^{c+d x}\right )}{d^2 \log ^2(f)}+\frac {\log \left (f^{c+d x}+1\right )}{d^2 \log ^2(f)}-\frac {x \log \left (f^{c+d x}+1\right )}{d \log (f)}+\frac {x}{d \log (f) \left (f^{c+d x}+1\right )}-\frac {x}{d \log (f)}+\frac {x^2}{2} \]
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Rule 29
Rule 31
Rule 36
Rule 2215
Rule 2216
Rule 2221
Rule 2222
Rule 2317
Rule 2320
Rule 2438
Rule 6820
Rubi steps \begin{align*} \text {integral}& = \int \frac {x}{\left (1+f^{c+d x}\right )^2} \, dx \\ & = -\int \frac {f^{c+d x} x}{\left (1+f^{c+d x}\right )^2} \, dx+\int \frac {x}{1+f^{c+d x}} \, dx \\ & = \frac {x^2}{2}+\frac {x}{d \left (1+f^{c+d x}\right ) \log (f)}-\frac {\int \frac {1}{1+f^{c+d x}} \, dx}{d \log (f)}-\int \frac {f^{c+d x} x}{1+f^{c+d x}} \, dx \\ & = \frac {x^2}{2}+\frac {x}{d \left (1+f^{c+d x}\right ) \log (f)}-\frac {x \log \left (1+f^{c+d x}\right )}{d \log (f)}-\frac {\text {Subst}\left (\int \frac {1}{x (1+x)} \, dx,x,f^{c+d x}\right )}{d^2 \log ^2(f)}+\frac {\int \log \left (1+f^{c+d x}\right ) \, dx}{d \log (f)} \\ & = \frac {x^2}{2}+\frac {x}{d \left (1+f^{c+d x}\right ) \log (f)}-\frac {x \log \left (1+f^{c+d x}\right )}{d \log (f)}-\frac {\text {Subst}\left (\int \frac {1}{x} \, dx,x,f^{c+d x}\right )}{d^2 \log ^2(f)}+\frac {\text {Subst}\left (\int \frac {1}{1+x} \, dx,x,f^{c+d x}\right )}{d^2 \log ^2(f)}+\frac {\text {Subst}\left (\int \frac {\log (1+x)}{x} \, dx,x,f^{c+d x}\right )}{d^2 \log ^2(f)} \\ & = \frac {x^2}{2}-\frac {x}{d \log (f)}+\frac {x}{d \left (1+f^{c+d x}\right ) \log (f)}+\frac {\log \left (1+f^{c+d x}\right )}{d^2 \log ^2(f)}-\frac {x \log \left (1+f^{c+d x}\right )}{d \log (f)}-\frac {\text {Li}_2\left (-f^{c+d x}\right )}{d^2 \log ^2(f)} \\ \end{align*}
Time = 0.14 (sec) , antiderivative size = 88, normalized size of antiderivative = 0.92 \[ \int \frac {x}{1+2 f^{c+d x}+f^{2 c+2 d x}} \, dx=\frac {1}{2} x \left (x+\frac {2}{d \log (f)+d f^{c+d x} \log (f)}\right )+\frac {\log \left (1+f^{c+d x}\right )}{d^2 \log ^2(f)}-\frac {x \left (1+\log \left (1+f^{c+d x}\right )\right )}{d \log (f)}-\frac {\operatorname {PolyLog}\left (2,-f^{c+d x}\right )}{d^2 \log ^2(f)} \]
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Time = 0.06 (sec) , antiderivative size = 143, normalized size of antiderivative = 1.49
method | result | size |
risch | \(\frac {x}{d \left (1+f^{d x +c}\right ) \ln \left (f \right )}+\frac {x^{2}}{2}+\frac {c x}{d}+\frac {c^{2}}{2 d^{2}}-\frac {\ln \left (1+f^{d x} f^{c}\right ) x}{d \ln \left (f \right )}-\frac {\operatorname {Li}_{2}\left (-f^{d x} f^{c}\right )}{d^{2} \ln \left (f \right )^{2}}-\frac {\ln \left (f^{d x} f^{c}\right )}{d^{2} \ln \left (f \right )^{2}}+\frac {\ln \left (1+f^{d x} f^{c}\right )}{d^{2} \ln \left (f \right )^{2}}-\frac {c \ln \left (f^{d x} f^{c}\right )}{d^{2} \ln \left (f \right )}\) | \(143\) |
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Time = 0.31 (sec) , antiderivative size = 143, normalized size of antiderivative = 1.49 \[ \int \frac {x}{1+2 f^{c+d x}+f^{2 c+2 d x}} \, dx=\frac {{\left (d^{2} x^{2} - c^{2}\right )} \log \left (f\right )^{2} + {\left ({\left (d^{2} x^{2} - c^{2}\right )} \log \left (f\right )^{2} - 2 \, {\left (d x + c\right )} \log \left (f\right )\right )} f^{d x + c} - 2 \, {\left (f^{d x + c} + 1\right )} {\rm Li}_2\left (-f^{d x + c}\right ) - 2 \, {\left (d x \log \left (f\right ) + {\left (d x \log \left (f\right ) - 1\right )} f^{d x + c} - 1\right )} \log \left (f^{d x + c} + 1\right ) - 2 \, c \log \left (f\right )}{2 \, {\left (d^{2} f^{d x + c} \log \left (f\right )^{2} + d^{2} \log \left (f\right )^{2}\right )}} \]
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\[ \int \frac {x}{1+2 f^{c+d x}+f^{2 c+2 d x}} \, dx=\frac {x}{d f^{c + d x} \log {\left (f \right )} + d \log {\left (f \right )}} + \frac {\int \frac {d x \log {\left (f \right )}}{e^{c \log {\left (f \right )}} e^{d x \log {\left (f \right )}} + 1}\, dx + \int \left (- \frac {1}{e^{c \log {\left (f \right )}} e^{d x \log {\left (f \right )}} + 1}\right )\, dx}{d \log {\left (f \right )}} \]
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Time = 0.21 (sec) , antiderivative size = 95, normalized size of antiderivative = 0.99 \[ \int \frac {x}{1+2 f^{c+d x}+f^{2 c+2 d x}} \, dx=\frac {1}{2} \, x^{2} + \frac {x}{d f^{d x} f^{c} \log \left (f\right ) + d \log \left (f\right )} - \frac {x}{d \log \left (f\right )} - \frac {d x \log \left (f^{d x} f^{c} + 1\right ) \log \left (f\right ) + {\rm Li}_2\left (-f^{d x} f^{c}\right )}{d^{2} \log \left (f\right )^{2}} + \frac {\log \left (f^{d x} f^{c} + 1\right )}{d^{2} \log \left (f\right )^{2}} \]
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\[ \int \frac {x}{1+2 f^{c+d x}+f^{2 c+2 d x}} \, dx=\int { \frac {x}{f^{2 \, d x + 2 \, c} + 2 \, f^{d x + c} + 1} \,d x } \]
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Timed out. \[ \int \frac {x}{1+2 f^{c+d x}+f^{2 c+2 d x}} \, dx=\int \frac {x}{f^{2\,c+2\,d\,x}+2\,f^{c+d\,x}+1} \,d x \]
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