Question 19322
"f o g" is an abreviation of...f(g(x))
"g o f" is an abreviation of...g(f(x))

If f(x) = 2x+1 and g(x) = 3x-2, then:

f o g = f(g(x)) = f(3x-2) = 2(3x-2)+1 = 6x-4+1 = 6x-3

g o f = g(f(x)) = g(2x+1) = 3(2x+1)-2 = 6x+3-2 = 6x+1