The first derivative
[src]
2 7 3*sign(x)
- x + -- + ---------
3 |x|
x
$$- x^{2} + \frac{3 \operatorname{sign}{\left(x \right)}}{\left|{x}\right|} + \frac{7}{x^{3}}$$
The second derivative
[src]
2
21 3*sign (x) 6*DiracDelta(x)
- -- - 2*x - ---------- + ---------------
4 2 |x|
x x
$$- 2 x + \frac{6 \delta\left(x\right)}{\left|{x}\right|} - \frac{3 \operatorname{sign}^{2}{\left(x \right)}}{x^{2}} - \frac{21}{x^{4}}$$
The third derivative
[src]
/ 2 \
| 42 3*sign (x) 3*DiracDelta(x, 1) 9*DiracDelta(x)*sign(x)|
2*|-1 + -- + ---------- + ------------------ - -----------------------|
| 5 3 |x| 2 |
\ x x x /
$$2 \left(-1 + \frac{3 \delta^{\left( 1 \right)}\left( x \right)}{\left|{x}\right|} - \frac{9 \delta\left(x\right) \operatorname{sign}{\left(x \right)}}{x^{2}} + \frac{3 \operatorname{sign}^{2}{\left(x \right)}}{x^{3}} + \frac{42}{x^{5}}\right)$$