Integrand size = 18, antiderivative size = 86 \[ \int \frac {\log \left (d \left (b x+c x^2\right )^n\right )}{x^4} \, dx=-\frac {n}{9 x^3}-\frac {c n}{6 b x^2}+\frac {c^2 n}{3 b^2 x}+\frac {c^3 n \log (x)}{3 b^3}-\frac {c^3 n \log (b+c x)}{3 b^3}-\frac {\log \left (d \left (b x+c x^2\right )^n\right )}{3 x^3} \]
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Time = 0.04 (sec) , antiderivative size = 86, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.111, Rules used = {2605, 78} \[ \int \frac {\log \left (d \left (b x+c x^2\right )^n\right )}{x^4} \, dx=\frac {c^3 n \log (x)}{3 b^3}-\frac {c^3 n \log (b+c x)}{3 b^3}+\frac {c^2 n}{3 b^2 x}-\frac {\log \left (d \left (b x+c x^2\right )^n\right )}{3 x^3}-\frac {c n}{6 b x^2}-\frac {n}{9 x^3} \]
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Rule 78
Rule 2605
Rubi steps \begin{align*} \text {integral}& = -\frac {\log \left (d \left (b x+c x^2\right )^n\right )}{3 x^3}+\frac {1}{3} n \int \frac {b+2 c x}{x^4 (b+c x)} \, dx \\ & = -\frac {\log \left (d \left (b x+c x^2\right )^n\right )}{3 x^3}+\frac {1}{3} n \int \left (\frac {1}{x^4}+\frac {c}{b x^3}-\frac {c^2}{b^2 x^2}+\frac {c^3}{b^3 x}-\frac {c^4}{b^3 (b+c x)}\right ) \, dx \\ & = -\frac {n}{9 x^3}-\frac {c n}{6 b x^2}+\frac {c^2 n}{3 b^2 x}+\frac {c^3 n \log (x)}{3 b^3}-\frac {c^3 n \log (b+c x)}{3 b^3}-\frac {\log \left (d \left (b x+c x^2\right )^n\right )}{3 x^3} \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 77, normalized size of antiderivative = 0.90 \[ \int \frac {\log \left (d \left (b x+c x^2\right )^n\right )}{x^4} \, dx=\frac {1}{3} n \left (-\frac {1}{3 x^3}-\frac {c}{2 b x^2}+\frac {c^2}{b^2 x}+\frac {c^3 \log (x)}{b^3}-\frac {c^3 \log (b+c x)}{b^3}\right )-\frac {\log \left (d (x (b+c x))^n\right )}{3 x^3} \]
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Time = 0.24 (sec) , antiderivative size = 72, normalized size of antiderivative = 0.84
method | result | size |
parts | \(-\frac {\ln \left (d \left (c \,x^{2}+b x \right )^{n}\right )}{3 x^{3}}+\frac {n \left (-\frac {1}{3 x^{3}}-\frac {c}{2 b \,x^{2}}+\frac {c^{3} \ln \left (x \right )}{b^{3}}+\frac {c^{2}}{b^{2} x}-\frac {c^{3} \ln \left (x c +b \right )}{b^{3}}\right )}{3}\) | \(72\) |
parallelrisch | \(-\frac {-6 \ln \left (x \right ) x^{3} c^{3} n +6 \ln \left (x c +b \right ) x^{3} c^{3} n +6 x^{3} c^{3} n -6 x^{2} b \,c^{2} n +3 x \,b^{2} c n +6 \ln \left (d \left (x \left (x c +b \right )\right )^{n}\right ) b^{3}+2 b^{3} n}{18 x^{3} b^{3}}\) | \(86\) |
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Time = 0.31 (sec) , antiderivative size = 82, normalized size of antiderivative = 0.95 \[ \int \frac {\log \left (d \left (b x+c x^2\right )^n\right )}{x^4} \, dx=-\frac {6 \, c^{3} n x^{3} \log \left (c x + b\right ) - 6 \, c^{3} n x^{3} \log \left (x\right ) - 6 \, b c^{2} n x^{2} + 3 \, b^{2} c n x + 6 \, b^{3} n \log \left (c x^{2} + b x\right ) + 2 \, b^{3} n + 6 \, b^{3} \log \left (d\right )}{18 \, b^{3} x^{3}} \]
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Time = 3.85 (sec) , antiderivative size = 112, normalized size of antiderivative = 1.30 \[ \int \frac {\log \left (d \left (b x+c x^2\right )^n\right )}{x^4} \, dx=\begin {cases} - \frac {n}{9 x^{3}} - \frac {\log {\left (d \left (b x + c x^{2}\right )^{n} \right )}}{3 x^{3}} - \frac {c n}{6 b x^{2}} + \frac {c^{2} n}{3 b^{2} x} - \frac {2 c^{3} n \log {\left (b + c x \right )}}{3 b^{3}} + \frac {c^{3} \log {\left (d \left (b x + c x^{2}\right )^{n} \right )}}{3 b^{3}} & \text {for}\: b \neq 0 \\- \frac {2 n}{9 x^{3}} - \frac {\log {\left (d \left (c x^{2}\right )^{n} \right )}}{3 x^{3}} & \text {otherwise} \end {cases} \]
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Time = 0.19 (sec) , antiderivative size = 75, normalized size of antiderivative = 0.87 \[ \int \frac {\log \left (d \left (b x+c x^2\right )^n\right )}{x^4} \, dx=-\frac {1}{18} \, n {\left (\frac {6 \, c^{3} \log \left (c x + b\right )}{b^{3}} - \frac {6 \, c^{3} \log \left (x\right )}{b^{3}} - \frac {6 \, c^{2} x^{2} - 3 \, b c x - 2 \, b^{2}}{b^{2} x^{3}}\right )} - \frac {\log \left ({\left (c x^{2} + b x\right )}^{n} d\right )}{3 \, x^{3}} \]
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Time = 0.36 (sec) , antiderivative size = 80, normalized size of antiderivative = 0.93 \[ \int \frac {\log \left (d \left (b x+c x^2\right )^n\right )}{x^4} \, dx=-\frac {c^{3} n \log \left (c x + b\right )}{3 \, b^{3}} + \frac {c^{3} n \log \left (x\right )}{3 \, b^{3}} - \frac {n \log \left (c x^{2} + b x\right )}{3 \, x^{3}} + \frac {6 \, c^{2} n x^{2} - 3 \, b c n x - 2 \, b^{2} n - 6 \, b^{2} \log \left (d\right )}{18 \, b^{2} x^{3}} \]
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Time = 1.68 (sec) , antiderivative size = 68, normalized size of antiderivative = 0.79 \[ \int \frac {\log \left (d \left (b x+c x^2\right )^n\right )}{x^4} \, dx=-\frac {\ln \left (d\,{\left (c\,x^2+b\,x\right )}^n\right )}{3\,x^3}-\frac {\frac {n}{3}-\frac {c^2\,n\,x^2}{b^2}+\frac {c\,n\,x}{2\,b}}{3\,x^3}-\frac {2\,c^3\,n\,\mathrm {atanh}\left (\frac {2\,c\,x}{b}+1\right )}{3\,b^3} \]
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