75-26=49
75-49=26
26+49=75
49+26=75
32-29=3
32-3=29
29+3=32
3+29=32
46-28=18
46-18=26
26+18=46
18+26=46
73-36=37
73-37=36
36+37=73
37+36=73
95-77=18
95-18=77
77+18=95
18+77=95
56-27=29
56-29=27
27+29=56
29+27=56
44-37=7
44-7=37
37+7=44
7+37=44
61-48=13
61-13=48
48+13=61
13+48=61