Find the function h(x) = f(x) + g(x) if f(x) = 4^x + 2 and g(x) = x - 4.

h( x) = 4 x + 1 -2
h( x) = 4 x + x + 6
h( x) = 4 x - 4
h( x) = 4 x + x - 2