(two *sin(x)-sin(two *x))*(two *cos(x)-cos(two *x))(- two *sin(x)+ two *sin(two *x))
(2 multiply by sinus of (x) minus sinus of (2 multiply by x)) multiply by (2 multiply by co sinus of e of (x) minus co sinus of e of (2 multiply by x))( minus 2 multiply by sinus of (x) plus 2 multiply by sinus of (2 multiply by x))
(two multiply by sinus of (x) minus sinus of (two multiply by x)) multiply by (two multiply by co sinus of e of (x) minus co sinus of e of (two multiply by x))( minus two multiply by sinus of (x) plus two multiply by sinus of (two multiply by x))