5+6=
76-70=
13-8=
6+70=
88-8+7=
90+6=
45-40=
8+10=
15-7=
10-8+6=
13-4=
9+8=
12-3=
19-5=
9+4-7=
36-6=
58-50=
8+3=
20+5=
12-3-9=