sign(x) |x| ------- - --- x 2 x
/|x| sign(x) \ 2*|--- - ------- + DiracDelta(x)| | 2 x | \ x / --------------------------------- x
/ 3*DiracDelta(x) 3*|x| 3*sign(x) \ 2*|- --------------- - ----- + --------- + DiracDelta(x, 1)| | x 3 2 | \ x x / ------------------------------------------------------------ x