23+34=
45+32=
55-35=
80-40=
50+30=
77-35=
36+33=
43-21=
57-25=
40+30=
58-28=
34+54=
90-60=
62-30=
45+43=
30+40=
60-30=
67+13=
43+23=
77-57=