8 + 7 = 15
8 + 60 = 68
8 + 12 = 20
25 + 7 = 32
25 + 60 = 85
25 + 12 = 37
79 + 7 = 86
79 + 60 = 139
79 + 12 = 91
 
36 − 4 = 32
36 − 16 = 20
36 − 32 = 4
50 − 4 = 46
50 − 16 = 34
50 − 32 = 18
91 − 4 = 87
91 − 16 = 75
91 − 32 = 59
 
5 * 6 = 30
5 * 10 = 50
5 * 30 = 150
12 * 6 = 72
12 * 10 = 120
12 * 30 = 360
80 * 6 = 480
80 * 10 = 800
80 * 30 = 2400
 
56 : 7 = 8
56 : 28 = 2
56 : 1 = 56
28 : 7 = 4
28 : 28 = 1
28 : 1 = 28
84 : 7 = 12
84 : 28 = 3
84 : 1 = 84