62-8= 7+39= 42-7= 48+4=
8+27= 73-30= 30-8= 35+20=
61-5= 57+40= 45-9= 7+35=
36+3= 42-6= 7+42= 57-50=
33-10= 53-20= 60-30= 41-7=