/ x / x\ 2*x \
| e 2*atan\E /*e / x\| x
2*|-------- - --------------- + atan\E /|*e
| 2*x 2*x |
\1 + e 1 + e /
--------------------------------------------
2*x
1 + e
$$\frac{2 e^{x}}{e^{2 x} + 1} \left(\operatorname{atan}{\left (e^{x} \right )} - \frac{2 e^{2 x} \operatorname{atan}{\left (e^{x} \right )}}{e^{2 x} + 1} + \frac{e^{x}}{e^{2 x} + 1}\right)$$
/ 3*x x / x\ 2*x / x\ 4*x \
| 6*e 3*e 8*atan\E /*e 8*atan\E /*e / x\| x
2*|- ----------- + -------- - --------------- + --------------- + atan\E /|*e
| 2 2*x 2*x 2 |
| / 2*x\ 1 + e 1 + e / 2*x\ |
\ \1 + e / \1 + e / /
------------------------------------------------------------------------------
2*x
1 + e
$$\frac{2 e^{x}}{e^{2 x} + 1} \left(\operatorname{atan}{\left (e^{x} \right )} - \frac{8 e^{2 x} \operatorname{atan}{\left (e^{x} \right )}}{e^{2 x} + 1} + \frac{3 e^{x}}{e^{2 x} + 1} + \frac{8 e^{4 x} \operatorname{atan}{\left (e^{x} \right )}}{\left(e^{2 x} + 1\right)^{2}} - \frac{6 e^{3 x}}{\left(e^{2 x} + 1\right)^{2}}\right)$$