6+=9
8+=13
12+=21
-3=6
-16=18
-13=33
48-=24
78-=29
80-=32
21+26=
27+45=
49+60=
1×6=
2×6=
3×6=

+22=72-36
-26=18+32
11++33=66
27+17+18+26=
23+=42-
16+22+16-29=
-88=+11
100-18-27-35=