19-5-2=
18-9-9=
6+( )=10
( )+6=13
6+( )=12
6+( )=11
( )+9=15
( )+6=14
9+( )=14
8+( )=15
8+( )=17
( )+9=18
( )+9=19
( )+7=11
6+( )=13
( )+8=15
9+( )=14
9+( )=11
( )+9=15
9+( )=11
6+( )=14
( )-6=2
( )-6=5
( )-6=7
( )-6=4
( )-6=6
( )-6=1
( )-6=3
( )-6=8
( )-6=9
( )-6=3+4
( )-6=5+3
( )-6=2+4
( )-6=9-2
( )+4=17-8
( )-6=18-9
10-6=( )-9
( )+6=5+8
6+( )=7+7
( )6=15-2
6+( )=7+6
9○6=15
6○8=14
15○9=6
14○5=9
9○5=14
8○2=10
8○2=6
12-3○2=11
12-3○2=7
15-8○14-7=7
13-6○7
16-3○13
17+2+1=
17-9+1=
13-9+6=
6+5=
11-6=
6+6=
12-6=
6+7=
13-6=
6+9=
15-6=
6+8=
14-6=
14-8=
15-8=
13-8=
11-8=