9+40= 12-8= 60+9= 44-4=
70+7= 12-4= 14-9= 18-9=
13-7= 15-7= 13-9= 12-3=
11-2= 4+9= 16-9= 9+3=
8+4-9= 9+9-8=
30-10+8= 30+60-70=