Hi I just have no clue where to start for this questions :S

Find the functions and their domains. (Enter the domains in interval notation.)

(

fx) =x+ 1/x, g(x) = x+14/x+2

(a)fg

( fg)(x)= domain

(b)gf

( gf)(x)= domain

(c)ff

( ff)(x)= domain

(d)gg

( gg)(x)= domain