______________?
13+3=
7+4=
9-6=
30+2=
9+7-6=
11-3=
15-6=
17-8=
13-5=
8-5+14=
6+7=
16-9=
15-7=
15+2=
4+8-3=
5549 16-711 17-816-8
1221 10+320 19-818-9
8+<10 15->7 20+<25 58->50
40+849 30+720 15-816-9 18-77+6
15-=9 -7=30 16-=7 +60=62