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