15-79 45-550 57-505
4+813 7+6076 12-57
6058 60+363-3
8998 65-565-60
6471 52+660-3
8179 40-925+20
20+7 81-3 64+7 42-40 37-2
>>>>
30+=38 11-=3
45<5 7+8>1
5445 755+80 87-787 - 80
9+913 +5 60+220+6 52 - 5052-2
11-3=
25-5=
14-6+4=
53-3=
8+70=
13-9+10=
66-60=
19-7=
73-70+14=