1
1*-------
____
/ 2
\/ x
d / 1 \ --|1*-------| dx| ____| | / 2 | \ \/ x /
1 sign(x)
--- + -------
|x| x
-------------
2
x
/ 1 2*sign(x)\
-2*|--- - DiracDelta(x) + ---------|
\|x| x /
------------------------------------
3
x