-|x| x*e
x*exp(-|x|)
-|x| -|x| - x*e *sign(x) + e
/ / 2 \\ -|x| -\2*sign(x) + x*\- sign (x) + 2*DiracDelta(x)//*e
/ 2 / 3 \\ -|x| -\- 3*sign (x) + 6*DiracDelta(x) + x*\sign (x) + 2*DiracDelta(x, 1) - 6*DiracDelta(x)*sign(x)//*e