3+(5•4)-2 = 3 + 20 - 2 = 30 (3+5)•4-2 = 8 • 4 - 2 = 13 5-4•1 = 5 - 4 • 1 = 1 5+(4•1) = 5 + (4 • 1) = 9
3+(5•4)-2 = 3 + 20 - 2 = 30
(3+5)•4-2 = 8 • 4 - 2 = 13
5-4•1 = 5 - 4 • 1 = 1
5+(4•1) = 5 + (4 • 1) = 9