57-40= 18+9= 37+5= 73-40= 48+7=
23+9= 54+30= 24-20= 98-8= 11+60=
11-5= 27-3= 30+50= 14-9= 50+16 =
16-8= 45-7= 43-20= 12-4= 14-6 =
46+20= 79-40= 55+30= 68-40=
46+2= 79-4= 85-3= 68-4=
46+9= 79+5= 85+7= 68+6=
14-7= 16-9= 65-60= 20+39=
31+8= 65-5= 14+3= 37+2=
87-50+2= 9+4-10= 17-7-3=
