2
4*x 3 3*x
-1 + ------ + ------------------- + ------------------
2 / 2\ 2 / 2\
1 + x 8*\1 + x /*atan (x) 2*\1 + x /*atan(x)
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2
/ 2\ _________
\1 + x / *\/ atan(x)
$$\frac{1}{\left(x^{2} + 1\right)^{2} \sqrt{\operatorname{atan}{\left (x \right )}}} \left(\frac{4 x^{2}}{x^{2} + 1} + \frac{3 x}{2 \left(x^{2} + 1\right) \operatorname{atan}{\left (x \right )}} - 1 + \frac{3}{8 \left(x^{2} + 1\right) \operatorname{atan}^{2}{\left (x \right )}}\right)$$