12-6= 11-2= 10-3=
6+=11 4+=13 3+=11
11-4= 15-6= 14-5=
13-67 15-59 14-58
11-37 12-412-5 11-212-3
11-5= 12-3= 13-6=
11-6= 11-2= 12-4=
11-5=1+ 13-9=3+
14-4-5= 18-6-4=
=