89-40=
76-50=
45-2=
89-4=
76-5=
54-30=
68-40=
77-40=
67-30=
68-30=
26-4=
85-70=
46-6=
73-50=
87-3=
99-7=
56-3=
72-20=
27-7=
95-70=
44-30=
58-40=
48-3=
48-30=
57-6=
47-6=
58-30=
75-3=
75+3=
34-3=
87-6=
74-2=
78-60=
34-30=
78-6=
74+2=
74-20=
75-3=
88-5=
56-4=