Question

fx=-x+2 , gx=(x-3)^(2)

y=g(f(x))
y=f(x)+g(x)
y=f(x)g(x)

Answer 1

f(x) = -x+2

g(x) = (x-3)^2

The only difficult one is the first:
g(f(x))
= g(-x+2)
= (-x+2 - 3)^2
= (-x-1)^2 or x^2 + 2x + 1

for the second, just add the two expressions
for the third, just multiply the two expressions