15-76 14- 85 14-9 12-6
13-86 11-75 11-317-8
12-67 17-9 8 15-84+2
99 29 54 83 9 87
<<<<<
54-4= 22+30= 62-60= 18-9= 16-9+3=
11-8= 26+7= 51-2= 40+30= 15-8-3=
45+3= 95-50= 37-6= 12-4= 6+8-9=
30+6= 71-8= 13-5= 67-9= 23-(9-7)=
47-20= 35+40= 45-30= 28+30=
30+15= 23+70= 74+20= 20+56=
20+63= 56-30= 60+32=