57-8= 38+9= 58-3= 74-40=
16-9= 13-7= 50+36= 30+45=
5+76= 74+6= 5+55= 70-9=
14-6= 15-8= 11-3= 3+67=
86-4= 50-5= 70-20= 4+58=