(not sure if its supposed to be - 72 or -7 - 2 or -7 + 2 so heres all three answers)
-72 : 3(5 - 8) - 7 - 16 - 72 = 15 - 24 - 7 - 16 - 72 = -104
-7 - 2 : 3(5 - 8) - 7 - 16 - 7 - 2 = 15 - 24 - 7 - 16 - 7 - 2 = -41
-7 + 2 : 3(5 - 8) - 7 - 16 - 7 + 2 = 15 - 24 - 7 - 16 - 7 + 2 = -37
