60+9= 15-8= 12+6= 73-3=
96-90= 30+4= 12-9= 20+8=
70+5= 16-8= 15+4= 48-40=
17-9= 50+9= 67-7= 10+8=
12+6= 34-4= 20+5= 18-6=