x*x*sign(x)
(x*x)*sign(x)
2 2*x*sign(x) + 2*x *DiracDelta(x)
/ 2 \ 2*\x *DiracDelta(x, 1) + 4*x*DiracDelta(x) + sign(x)/
/ 2 \ 2*\6*DiracDelta(x) + x *DiracDelta(x, 2) + 6*x*DiracDelta(x, 1)/