Given the functions:
f(x) = x + 5

g(x) = 2x - 1

h(x) = 2x² + 9y - 5

Determine the following functions:

1. (f + g)(x) =
2. (f- g)(x) =
3. (f•g)(x) =
4. (h/g)(x) =
5. (f+g) (3) =​