Answer:
Look below
Step-by-step explanation:
First, you solve inside the parenthesis. 13 + 7 = 20 and 12 + 4 = 16. then you do inside these []. 20 - 16 = 4. 16 divided by 4 = 4
Hope this helped.
(P.S.: if this is an essay DO NOT copy this word to word. Your teacher sees EVERYTHING (to me its creepy >.<) )