f(x) = sin (x)

g(x) = x^2 - x + 1

the question basically asks for a composite g o f, or g(f(x)). I get:

= sin (x^2 - x + 1)

= sin^2x - sin x + .... (i dont know how to multiply sin with 1, is it just sin(1) ?)

its kinda confusing for me, since sine isn't really a variable, it's more like a "modifier" for a variable