34 * 2 − 63 : 9 = 68 − 7 = 61
90 − (35 + 29 − 16) = 90 − (64 − 16) = 90 − 48 = 42
90 : 30 * 7 + 49 = 3 * 7 + 49 = 21 + 49 = 70
40 : 2 * 5 − 20 * 2 = 20 * 5 − 40 = 100 − 40 = 60
27 * 3 : 9 + 54 = (20 + 7) * 3 : 9 + 54 = (60 + 21) : 9 + 54 = 81 : 9 + 54 = 9 + 54 = 63
96 − 72 : 8 * 3 = 96 − 9 * 3 = 96 − 27 = 69