4+80= 73-3= 20+5= 12-3= 48-40+5=
13-5= 6+8= 17-9= 17-10= 72+8-6=
43-40= 24+0= 38+5= 8+7= 37-30+9=
56-4= 9+46= 90-5= 40+60= 75-40-3=