8+50=
14-6=
17-8=
13-4-3=
56-50=
47-7=
15-9=
3+4+9=
78-8=
13-8=
11-2=
6+7-5=
20+9=
14-8=
15-7=
12-6+4=
78-=70 +10=90
66-=6 -9=9