Perform the following operations.
Given: f(x) = 2x - 3, g(x) = x2 - 2x + 1, h(x) = 2x2 +3x
1. f (x) - g(x)
2. g(0) + f (-1)
3. f(x) × g(x)
4. g(f(x))
5. f(g(2))
6. h(n+1)
