f(x) = 2x , g(x) = x-1 , h(x) = 3x-2 maka (hofog) (-1) =

(hofog)(-1) = h(f(g(-1)))

g(-1) = -1-1
         =-2
f(-2) = 2(-2)
        = -4
h(-4)= 3(-4)-2
        =-12-2
        =-14

jadi (hofog)(-1) = -14