2.
7 x 8 - 3 x 5 = 56 - 15 = 41
8 x (4 + 5) = 8 x 9 = 72
7 x 10 + 18 : 3 = 70 + 6 = 76
60 - 4 x (8 - 5) =60 - 4 x 3 = 60 - 12 = 48
4 x (7 + 5) - 15 : 3 = 4x 12 - 5 = 48 - 5 = 44
4.
(30 + 3) x 6 + 7 x 4 = 33 x 6 + 28 = 198 + 28 = 226
30 + 3 x (6 + 7) x 4 = 30 + 3 x 13 x 4 = 30 + 36 x 4 = 30 + 114 = 144
(30 + 3 x 6) + 7 x 4 = (39 + 18) + 28 = 57 + 28 = 85
