Express your polynomial in standard form
f(x)=x-7
g(x)=g(x)=3x^2-7x-10
(f∘g)(x)
(f o g)(x) just means this = f (g) = we are putting "g" into "f'
So
f = [ x ] - 7 =
(f o g) = [ 3x^2 - 7x - 10 ] - 7 = 3x^2 - 7x - 17