14-9=
11-3=
98-80=
( )-7=18
89-80+6=
88-9=
31+5=
50+20=
9+( )=15
94-6-50=
12+50=
63+30=
8+37=
80=85-( )
35+(60-20)=
97-90=
43-6=
62-5=
10=( )-50
56-(5+35)=