16-9= 59-9= 11-3= 14-5=
63-60= 13-4= 38+20= 48-5=
13-8= 6+7= 11-5= 15-7=
8+9= 7+30= 35-3= 87-30=
46+20= 10+78= 48-6= 3+54=
12-8+9= 5+6-7= 40+6+20= 90-50+42=
75-40-3= 32-2+58= 9-6+70= 4+75-50=