a) 74 - 12 + 18 = 74 - 30 = 44
b) 34 + 12 * 3 = 34 + 36 = 70
c) 264 - 64 : 16 = 264 - 4 = 260
d) 18 + 2 * 9 = 18 + 18 = 36
e) 145 - 45 : (17 - 8) = 145 - 5 = 140
f) 14 + (12 + 48 : 4) = 14 + 24 = 38
g) 340 : (13 + 7 * 3) : 2 = 340 : 34 : 2 = 10 : 2 = 5
