59-6= 38-3= 12-7= 5+42= 23-3+48=
53+6= 18-9= 4+45= 15-7= 64-40-3=
15-9= 50+16= 25+20= 13-6= 80-50+34=
7+40= 91-30= 71-50= 80+3= 20+8+50=
17-8= 66-5= 20+18= 17+60= 53+30-40=