/ / x x / / x\\\\
/ 2/ / x\\\ | | e 2*e *tanh\log\1 + e //|| x
\-1 + tanh \log\1 + e ///*|-2 + x*|-1 + ------ + ----------------------||*e
| | x x ||
\ \ 1 + e 1 + e //
----------------------------------------------------------------------------
x
1 + e
$$\frac{\left(x \left(-1 + \frac{2 e^{x} \tanh{\left(\log{\left(e^{x} + 1 \right)} \right)}}{e^{x} + 1} + \frac{e^{x}}{e^{x} + 1}\right) - 2\right) \left(\tanh^{2}{\left(\log{\left(e^{x} + 1 \right)} \right)} - 1\right) e^{x}}{e^{x} + 1}$$
/ / x 2*x x / / x\\ / 2/ / x\\\ 2*x 2/ / x\\ 2*x 2*x / / x\\\ x x / / x\\\
/ 2/ / x\\\ | | 3*e 2*e 6*e *tanh\log\1 + e // 2*\-1 + tanh \log\1 + e ///*e 4*tanh \log\1 + e //*e 6*e *tanh\log\1 + e //| 3*e 6*e *tanh\log\1 + e //| x
\-1 + tanh \log\1 + e ///*|-3 - x*|1 - ------ + --------- - ---------------------- + -------------------------------- + ------------------------- + ------------------------| + ------ + ----------------------|*e
| | x 2 x 2 2 2 | x x |
| | 1 + e / x\ 1 + e / x\ / x\ / x\ | 1 + e 1 + e |
\ \ \1 + e / \1 + e / \1 + e / \1 + e / / /
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
x
1 + e
$$\frac{\left(\tanh^{2}{\left(\log{\left(e^{x} + 1 \right)} \right)} - 1\right) \left(- x \left(1 - \frac{6 e^{x} \tanh{\left(\log{\left(e^{x} + 1 \right)} \right)}}{e^{x} + 1} - \frac{3 e^{x}}{e^{x} + 1} + \frac{2 \left(\tanh^{2}{\left(\log{\left(e^{x} + 1 \right)} \right)} - 1\right) e^{2 x}}{\left(e^{x} + 1\right)^{2}} + \frac{4 e^{2 x} \tanh^{2}{\left(\log{\left(e^{x} + 1 \right)} \right)}}{\left(e^{x} + 1\right)^{2}} + \frac{6 e^{2 x} \tanh{\left(\log{\left(e^{x} + 1 \right)} \right)}}{\left(e^{x} + 1\right)^{2}} + \frac{2 e^{2 x}}{\left(e^{x} + 1\right)^{2}}\right) - 3 + \frac{6 e^{x} \tanh{\left(\log{\left(e^{x} + 1 \right)} \right)}}{e^{x} + 1} + \frac{3 e^{x}}{e^{x} + 1}\right) e^{x}}{e^{x} + 1}$$