7-5=2
10-5=5
11-6=5
14-9=5
13-8=5
14-5=9
7-5=2 10-5=5 11-6=5
13-8=5 14-5=9 14-9=5
2+5=10 5+9=14 5+5=10
7-5=2
10-5=5
11-6=5
14-9=5
13-8=5
14-5=9
7-5=2 10-5=5 11-6=5
13-8=5 14-5=9 14-9=5
2+5=10 5+9=14 5+5=10