9-2=
1+6=
10-7=
10-5+4=
10+5=
14-4=
19-10=
4+6+6=
6-6=
3+7=
2+6=
10-4+10=
8+2=
3+10=
8-8=
8-7+7=
5+( )=5
7+( )=17
( )+5=15
11-( )=1
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