15+25= 43-18= 65-40= 59+21=
73-25= 27+18= 17+35= 40-13=
100-40= 25-12= 80+10= 70-16=
60-50= 60+24= 36+30=
27+58= 9+66= 84-38= 90-3=
55+38= 66+14 = 63-36= 100-27=
34+36 = 100-77= 41-18=
85-5= 89-9= 50+6= 34+20=
23-3= 53-3= 62+8= 70-60=