84:12, 54:18, 78:26, 42:2, 4+15+13, 6+13+13, 80:(4+76), 96-64:4, (96-64):4, 56:8-7, 63:9-3, 70:10

84:12 = 7

54:18 = 3

78:26 = 3

42:2 = 21

4+15+13 = 32

6+13+13 = 32

80:(4+76) = 80:80 = 1

96-64:4 = 96-16 = 80

(96-64):4 = 32:4 = 8

56:8-7 = 7-7 = 0

63:9-3 = 7-3 = 4

70:10 = 7