1. f(g(1))
2. g(f(1))
3. f(f(1))
4. g(g(1))
5. (g o f)(3)
6. (f 0 g)(6)

x 1 2 3 4 5 6
f(x) 5 1 6 4 5 3
g(x) 4 2 1 5 2 5