g(n) = 2n + 2 f(n) = n2 - 2 Find g( f(n))

g ( f(n) )   means  that we are putting the function f  into  g   (for n)

So we have

2 ( n^2 - 2)  +  2  =

2n^2  - 4  +  2   =

2n^2  - 2