(three *sin(two *x) - four *cos(two *x))*exp(-x) = zero
(3 multiply by sinus of (2 multiply by x) minus 4 multiply by co sinus of e of (2 multiply by x)) multiply by exponent of ( minus x) equally 0
(three multiply by sinus of (two multiply by x) minus four multiply by co sinus of e of (two multiply by x)) multiply by exponent of ( minus x) equally zero
