The second derivative
[src]
/ / 2\ / sign(x) \\
| \1 + x /*|- ------- + DiracDelta(x)||
| 1 2*sign(x) \ x /|
2*|--- - --------- - ------------------------------------|
||x| x 2 |
\ x /
$$2 \left(\frac{1}{\left|{x}\right|} - \frac{2 \operatorname{sign}{\left(x \right)}}{x} - \frac{\left(x^{2} + 1\right) \left(\delta\left(x\right) - \frac{\operatorname{sign}{\left(x \right)}}{x}\right)}{x^{2}}\right)$$
The third derivative
[src]
/ / 2\ / 4*DiracDelta(x) 3*sign(x) \\
| \1 + x /*|- --------------- + --------- + DiracDelta(x, 1)||
| | x 2 ||
| 3*sign(x) \ x /|
-2*|6*DiracDelta(x) - --------- + -----------------------------------------------------------|
\ x x /
----------------------------------------------------------------------------------------------
x
$$- \frac{2 \left(6 \delta\left(x\right) + \frac{\left(x^{2} + 1\right) \left(\delta^{\left( 1 \right)}\left( x \right) - \frac{4 \delta\left(x\right)}{x} + \frac{3 \operatorname{sign}{\left(x \right)}}{x^{2}}\right)}{x} - \frac{3 \operatorname{sign}{\left(x \right)}}{x}\right)}{x}$$