16=7 4 4=0 63=3 43=7
-3=1 5-=4 +4=7 6+=6
4-3 4 5+0 5-0 2+52+3 6-4 7-3
4+3= 2+2= 0+7= 6-5=
7-5= 6-1= 1+6= 2+3=
4+1= 6-4= 7-6= 5-0=
3+3= 5-2= 7-1= 7-4=
个