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• Identical expressions

• two *(x*DiracDelta(x) + sign(x)) = zero
• 2 multiply by (x multiply by DiracDelta(x) plus sign(x)) equally 0
• two multiply by (x multiply by DiracDelta(x) plus sign(x)) equally zero
• 2(xDiracDelta(x) + sign(x)) = 0
• 2xDiracDeltax + signx = 0

• Similar expressions

• 2*(x*DiracDelta(x) - sign(x)) = 0