/ 2 |x| sign(x)\ 2*|x|
x*|------- + --- - -------| - -----
|1 + |x| 2 x | x
\ x /
-----------------------------------
2
(1 + |x|)
$$\frac{x \left(\frac{2}{\left|{x}\right| + 1} - \frac{\operatorname{sign}{\left(x \right)}}{x} + \frac{\left|{x}\right|}{x^{2}}\right) - \frac{2 \left|{x}\right|}{x}}{\left(\left|{x}\right| + 1\right)^{2}}$$
4 |x| sign(x) 6*|x| 2*|x|*sign(x)
-2*DiracDelta(x) + ------- + --- - ------- - ---------- + -------------
1 + |x| 2 x 2 x*(1 + |x|)
x (1 + |x|)
-----------------------------------------------------------------------
2
(1 + |x|)
$$\frac{- 2 \delta\left(x\right) + \frac{4}{\left|{x}\right| + 1} - \frac{6 \left|{x}\right|}{\left(\left|{x}\right| + 1\right)^{2}} - \frac{\operatorname{sign}{\left(x \right)}}{x} + \frac{2 \left|{x}\right| \operatorname{sign}{\left(x \right)}}{x \left(\left|{x}\right| + 1\right)} + \frac{\left|{x}\right|}{x^{2}}}{\left(\left|{x}\right| + 1\right)^{2}}$$