$$\operatorname{sign}{\left(x \right)} + 1 - \frac{1}{x^{2}}$$
/1 \
2*|-- + DiracDelta(x)|
| 3 |
\x /
$$2 \left(\delta\left(x\right) + \frac{1}{x^{3}}\right)$$
/ 3 \
2*|- -- + DiracDelta(x, 1)|
| 4 |
\ x /
$$2 \left(\delta^{\left( 1 \right)}\left( x \right) - \frac{3}{x^{4}}\right)$$