80-3 77+4=81. 69+9 78-23=55
75+6 81-5=76 48+11 37+52=89
56+3 59+1=60 51+15 66+31=97
95-8 87-8=79 34+42 76-58=18
59+5 64+6=70 27+64 92-68=24
99-1 98-9=89 38+55 93-65=28
64+7 71-6=65 42-28 14+73=87
86+9 95-7=88 44-31 13+56=69
75-7 68+9=77 63+22 85-31=34
43+7 50-2=48 81-56 25+33=58
47-8 39-5=34 77-39 38-18=20
53+8 61-3=58 98-79 19+57=76