12
-3=
9
13
14
15
16
17
18
19
126+6 16-7 19-9
18-8 9 6 14-6
12-33+5 7+8 9+6
10-1
10-2
10-3
10-5
10-7
10-9
11-2
12-9
14-6
15-6
18-9
15-7= 18-=6
13-7=15- +6=11