-x^ two *sin(x) + four *x*cos(x) + two *sin(x) = zero
minus x squared multiply by sinus of (x) plus 4 multiply by x multiply by co sinus of e of (x) plus 2 multiply by sinus of (x) equally 0
minus x to the power of two multiply by sinus of (x) plus four multiply by x multiply by co sinus of e of (x) plus two multiply by sinus of (x) equally zero
-x2*sin(x) + 4*x*cos(x) + 2*sin(x) = 0
-x2*sinx + 4*x*cosx + 2*sinx = 0
-x²*sin(x) + 4*x*cos(x) + 2*sin(x) = 0
-x to the power of 2*sin(x) + 4*x*cos(x) + 2*sin(x) = 0