sin(x)/Abs(sin(x)) + sign(sin(x)) - two *cos(x)^ two *DiracDelta(sin(x))/sin(x) = zero
sinus of (x) divide by Abs( sinus of (x)) plus sign( sinus of (x)) minus 2 multiply by co sinus of e of (x) squared multiply by DiracDelta( sinus of (x)) divide by sinus of (x) equally 0
sinus of (x) divide by Abs( sinus of (x)) plus sign( sinus of (x)) minus two multiply by co sinus of e of (x) to the power of two multiply by DiracDelta( sinus of (x)) divide by sinus of (x) equally zero