Integrand size = 4, antiderivative size = 21 \[ \int x \arctan (x) \, dx=-\frac {x}{2}+\frac {\arctan (x)}{2}+\frac {1}{2} x^2 \arctan (x) \]
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Time = 0.01 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.750, Rules used = {4946, 327, 209} \[ \int x \arctan (x) \, dx=\frac {1}{2} x^2 \arctan (x)+\frac {\arctan (x)}{2}-\frac {x}{2} \]
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Rule 209
Rule 327
Rule 4946
Rubi steps \begin{align*} \text {integral}& = \frac {1}{2} x^2 \arctan (x)-\frac {1}{2} \int \frac {x^2}{1+x^2} \, dx \\ & = -\frac {x}{2}+\frac {1}{2} x^2 \arctan (x)+\frac {1}{2} \int \frac {1}{1+x^2} \, dx \\ & = -\frac {x}{2}+\frac {\arctan (x)}{2}+\frac {1}{2} x^2 \arctan (x) \\ \end{align*}
Time = 0.00 (sec) , antiderivative size = 16, normalized size of antiderivative = 0.76 \[ \int x \arctan (x) \, dx=\frac {1}{2} \left (-x+\left (1+x^2\right ) \arctan (x)\right ) \]
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Time = 0.04 (sec) , antiderivative size = 16, normalized size of antiderivative = 0.76
method | result | size |
default | \(-\frac {x}{2}+\frac {\arctan \left (x \right )}{2}+\frac {x^{2} \arctan \left (x \right )}{2}\) | \(16\) |
meijerg | \(-\frac {x}{2}+\frac {\left (3 x^{2}+3\right ) \arctan \left (x \right )}{6}\) | \(16\) |
parallelrisch | \(-\frac {x}{2}+\frac {\arctan \left (x \right )}{2}+\frac {x^{2} \arctan \left (x \right )}{2}\) | \(16\) |
parts | \(-\frac {x}{2}+\frac {\arctan \left (x \right )}{2}+\frac {x^{2} \arctan \left (x \right )}{2}\) | \(16\) |
risch | \(-\frac {i x^{2} \ln \left (i x +1\right )}{4}+\frac {i x^{2} \ln \left (-i x +1\right )}{4}-\frac {x}{2}+\frac {\arctan \left (x \right )}{2}\) | \(35\) |
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Time = 0.25 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.62 \[ \int x \arctan (x) \, dx=\frac {1}{2} \, {\left (x^{2} + 1\right )} \arctan \left (x\right ) - \frac {1}{2} \, x \]
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Time = 0.12 (sec) , antiderivative size = 15, normalized size of antiderivative = 0.71 \[ \int x \arctan (x) \, dx=\frac {x^{2} \operatorname {atan}{\left (x \right )}}{2} - \frac {x}{2} + \frac {\operatorname {atan}{\left (x \right )}}{2} \]
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Time = 0.27 (sec) , antiderivative size = 15, normalized size of antiderivative = 0.71 \[ \int x \arctan (x) \, dx=\frac {1}{2} \, x^{2} \arctan \left (x\right ) - \frac {1}{2} \, x + \frac {1}{2} \, \arctan \left (x\right ) \]
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Time = 0.27 (sec) , antiderivative size = 15, normalized size of antiderivative = 0.71 \[ \int x \arctan (x) \, dx=\frac {1}{2} \, x^{2} \arctan \left (x\right ) - \frac {1}{2} \, x + \frac {1}{2} \, \arctan \left (x\right ) \]
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Time = 0.03 (sec) , antiderivative size = 14, normalized size of antiderivative = 0.67 \[ \int x \arctan (x) \, dx=\mathrm {atan}\left (x\right )\,\left (\frac {x^2}{2}+\frac {1}{2}\right )-\frac {x}{2} \]
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