Answer:
1)2x^2 2)8x^3 3)4x-8
Step-by-step explanation:
1- you plug in x in g but nothing changes so then h and gyou just add 2- you plug in x in g again but once again, it remains the same so you just multiphy g and h and you get 8x^2 3- you plug in -2 into g to get 8 and then subtract it form h
