atan(x)
e
--------
2
1 + x
$$\frac{e^{\operatorname{atan}{\left(x \right)}}}{x^{2} + 1}$$
atan(x)
(1 - 2*x)*e
------------------
2
/ 2\
\1 + x /
$$\frac{\left(1 - 2 x\right) e^{\operatorname{atan}{\left(x \right)}}}{\left(x^{2} + 1\right)^{2}}$$
/ 2 \
| 1 6*x 8*x | atan(x)
|-2 + ------ - ------ + ------|*e
| 2 2 2|
\ 1 + x 1 + x 1 + x /
----------------------------------------
2
/ 2\
\1 + x /
$$\frac{\left(\frac{8 x^{2}}{x^{2} + 1} - \frac{6 x}{x^{2} + 1} - 2 + \frac{1}{x^{2} + 1}\right) e^{\operatorname{atan}{\left(x \right)}}}{\left(x^{2} + 1\right)^{2}}$$