15-2=
9+9=
16-2=
14-8=
11-3=
10-5=
18+1=
8+9=
4-2=
17-7=
12-7=
14-5=
18-3=
11-6=
14-6=
32+7= 80+9= 38-17= 4+20= 73+5= 67-33=
68-28= 44+24= 86+10= 53-20= 84-50= 53+40=
77+22= 24+43= 20+60= 38-25= 99-81= 36-36=
16-8 11-4 12-7 15-9 17-8
14-9 12-3 16-9 14-6 11-5