24 : (42 - 34) x 2 = 24 : 8 x 2 = 3 x 2 = 6
16 + (84 - 3 x 6) = 16 + (84 - 18) = 16 + 66 = 82
18 : (3 x 3) + 98 = 18 : 9 + 98 = 2 + 98 = 100
90 - 3 x 9 + 18 = 90 - 27 + 18 = 63 + 18 = 81
7 x 3 + 9 x 4 = 21 + 36 = 57
56 + 24 : 4 x 3 = 56 + 6 x 3 = 56 + 18 = 74