Integrand size = 10, antiderivative size = 120 \[ \int \frac {\cot ^{-1}(a+b x)}{x} \, dx=-\cot ^{-1}(a+b x) \log \left (\frac {2}{1-i (a+b x)}\right )+\cot ^{-1}(a+b x) \log \left (\frac {2 b x}{(i-a) (1-i (a+b x))}\right )-\frac {1}{2} i \operatorname {PolyLog}\left (2,1-\frac {2}{1-i (a+b x)}\right )+\frac {1}{2} i \operatorname {PolyLog}\left (2,1-\frac {2 b x}{(i-a) (1-i (a+b x))}\right ) \]
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Time = 0.08 (sec) , antiderivative size = 120, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.500, Rules used = {5156, 4967, 2449, 2352, 2497} \[ \int \frac {\cot ^{-1}(a+b x)}{x} \, dx=-\frac {1}{2} i \operatorname {PolyLog}\left (2,1-\frac {2}{1-i (a+b x)}\right )+\frac {1}{2} i \operatorname {PolyLog}\left (2,1-\frac {2 b x}{(i-a) (1-i (a+b x))}\right )+\log \left (\frac {2}{1-i (a+b x)}\right ) \left (-\cot ^{-1}(a+b x)\right )+\log \left (\frac {2 b x}{(-a+i) (1-i (a+b x))}\right ) \cot ^{-1}(a+b x) \]
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Rule 2352
Rule 2449
Rule 2497
Rule 4967
Rule 5156
Rubi steps \begin{align*} \text {integral}& = \frac {\text {Subst}\left (\int \frac {\cot ^{-1}(x)}{-\frac {a}{b}+\frac {x}{b}} \, dx,x,a+b x\right )}{b} \\ & = -\cot ^{-1}(a+b x) \log \left (\frac {2}{1-i (a+b x)}\right )+\cot ^{-1}(a+b x) \log \left (\frac {2 b x}{(i-a) (1-i (a+b x))}\right )-\text {Subst}\left (\int \frac {\log \left (\frac {2}{1-i x}\right )}{1+x^2} \, dx,x,a+b x\right )+\text {Subst}\left (\int \frac {\log \left (\frac {2 \left (-\frac {a}{b}+\frac {x}{b}\right )}{\left (\frac {i}{b}-\frac {a}{b}\right ) (1-i x)}\right )}{1+x^2} \, dx,x,a+b x\right ) \\ & = -\cot ^{-1}(a+b x) \log \left (\frac {2}{1-i (a+b x)}\right )+\cot ^{-1}(a+b x) \log \left (\frac {2 b x}{(i-a) (1-i (a+b x))}\right )+\frac {1}{2} i \operatorname {PolyLog}\left (2,1-\frac {2 b x}{(i-a) (1-i (a+b x))}\right )-i \text {Subst}\left (\int \frac {\log (2 x)}{1-2 x} \, dx,x,\frac {1}{1-i (a+b x)}\right ) \\ & = -\cot ^{-1}(a+b x) \log \left (\frac {2}{1-i (a+b x)}\right )+\cot ^{-1}(a+b x) \log \left (\frac {2 b x}{(i-a) (1-i (a+b x))}\right )-\frac {1}{2} i \operatorname {PolyLog}\left (2,1-\frac {2}{1-i (a+b x)}\right )+\frac {1}{2} i \operatorname {PolyLog}\left (2,1-\frac {2 b x}{(i-a) (1-i (a+b x))}\right ) \\ \end{align*}
Both result and optimal contain complex but leaf count is larger than twice the leaf count of optimal. \(256\) vs. \(2(120)=240\).
Time = 0.15 (sec) , antiderivative size = 256, normalized size of antiderivative = 2.13 \[ \int \frac {\cot ^{-1}(a+b x)}{x} \, dx=\left (\cot ^{-1}(a+b x)+\arctan (a+b x)\right ) \log (x)+\arctan (a+b x) \left (\log \left (\frac {1}{\sqrt {1+(a+b x)^2}}\right )-\log (-\sin (\arctan (a)-\arctan (a+b x)))\right )+\frac {1}{2} \left (\frac {1}{4} i (\pi -2 \arctan (a+b x))^2+i (\arctan (a)-\arctan (a+b x))^2-(\pi -2 \arctan (a+b x)) \log \left (1+e^{-2 i \arctan (a+b x)}\right )+2 (\arctan (a)-\arctan (a+b x)) \log \left (1-e^{2 i (-\arctan (a)+\arctan (a+b x))}\right )+(\pi -2 \arctan (a+b x)) \log \left (\frac {2}{\sqrt {1+(a+b x)^2}}\right )+2 (-\arctan (a)+\arctan (a+b x)) \log (-2 \sin (\arctan (a)-\arctan (a+b x)))+i \operatorname {PolyLog}\left (2,-e^{-2 i \arctan (a+b x)}\right )+i \operatorname {PolyLog}\left (2,e^{2 i (-\arctan (a)+\arctan (a+b x))}\right )\right ) \]
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Time = 0.39 (sec) , antiderivative size = 103, normalized size of antiderivative = 0.86
method | result | size |
risch | \(\frac {\pi \ln \left (-i b x \right )}{2}-\frac {i \ln \left (-i b x -i a +1\right ) \ln \left (-\frac {i x b}{i a -1}\right )}{2}-\frac {i \operatorname {dilog}\left (-\frac {i x b}{i a -1}\right )}{2}+\frac {i \ln \left (i b x +i a +1\right ) \ln \left (\frac {i x b}{-i a -1}\right )}{2}+\frac {i \operatorname {dilog}\left (\frac {i x b}{-i a -1}\right )}{2}\) | \(103\) |
parts | \(\ln \left (x \right ) \operatorname {arccot}\left (b x +a \right )+b \left (-\frac {i \ln \left (x \right ) \left (\ln \left (\frac {-b x -a +i}{i-a}\right )-\ln \left (\frac {b x +a +i}{i+a}\right )\right )}{2 b}-\frac {i \left (\operatorname {dilog}\left (\frac {-b x -a +i}{i-a}\right )-\operatorname {dilog}\left (\frac {b x +a +i}{i+a}\right )\right )}{2 b}\right )\) | \(104\) |
derivativedivides | \(\ln \left (-b x \right ) \operatorname {arccot}\left (b x +a \right )+\frac {i \ln \left (-b x \right ) \ln \left (\frac {b x +a +i}{i+a}\right )}{2}-\frac {i \ln \left (-b x \right ) \ln \left (\frac {-b x -a +i}{i-a}\right )}{2}+\frac {i \operatorname {dilog}\left (\frac {b x +a +i}{i+a}\right )}{2}-\frac {i \operatorname {dilog}\left (\frac {-b x -a +i}{i-a}\right )}{2}\) | \(106\) |
default | \(\ln \left (-b x \right ) \operatorname {arccot}\left (b x +a \right )+\frac {i \ln \left (-b x \right ) \ln \left (\frac {b x +a +i}{i+a}\right )}{2}-\frac {i \ln \left (-b x \right ) \ln \left (\frac {-b x -a +i}{i-a}\right )}{2}+\frac {i \operatorname {dilog}\left (\frac {b x +a +i}{i+a}\right )}{2}-\frac {i \operatorname {dilog}\left (\frac {-b x -a +i}{i-a}\right )}{2}\) | \(106\) |
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\[ \int \frac {\cot ^{-1}(a+b x)}{x} \, dx=\int { \frac {\operatorname {arccot}\left (b x + a\right )}{x} \,d x } \]
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Timed out. \[ \int \frac {\cot ^{-1}(a+b x)}{x} \, dx=\text {Timed out} \]
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none
Time = 0.34 (sec) , antiderivative size = 133, normalized size of antiderivative = 1.11 \[ \int \frac {\cot ^{-1}(a+b x)}{x} \, dx=\frac {1}{2} \, \arctan \left (\frac {b x}{a^{2} + 1}, -\frac {a b x}{a^{2} + 1}\right ) \log \left (b^{2} x^{2} + 2 \, a b x + a^{2} + 1\right ) - \frac {1}{2} \, \arctan \left (b x + a\right ) \log \left (\frac {b^{2} x^{2}}{a^{2} + 1}\right ) + \operatorname {arccot}\left (b x + a\right ) \log \left (x\right ) + \arctan \left (\frac {b^{2} x + a b}{b}\right ) \log \left (x\right ) + \frac {1}{2} i \, {\rm Li}_2\left (\frac {i \, b x + i \, a + 1}{i \, a + 1}\right ) - \frac {1}{2} i \, {\rm Li}_2\left (\frac {i \, b x + i \, a - 1}{i \, a - 1}\right ) \]
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\[ \int \frac {\cot ^{-1}(a+b x)}{x} \, dx=\int { \frac {\operatorname {arccot}\left (b x + a\right )}{x} \,d x } \]
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Timed out. \[ \int \frac {\cot ^{-1}(a+b x)}{x} \, dx=\int \frac {\mathrm {acot}\left (a+b\,x\right )}{x} \,d x \]
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