54-4= 2+70= 65-5= 20+6=
90+5= 77-7= 69-60= 28-20=
37-7= 6+70= 34-30= 89-9=
15-7= 11-5= 4+7= 5+8=
14-7= 95-5= 9+30= 18-9=
20+60= 55-5= 40+5= 65-30=
7+6= 13-7= 4+8=
