16 - 36 = 25 - 4542 - 9*4 = 52 - 9*542 - 9*4 + 81/4 = 52 - 9*5 + 81/4(4 - 9/2)2 = (5 - 9/2)2 4 - 9/2 = 5 - 9/24 = 5LOL