3+17= 9+3= 10-2= 13+4= 9-6= 7+7= 6+2= 8+4=
1+19= 18-5= 19-8= 7+6= 14+5= 9+9= 19-7= 9+7=
15-3= 7-5= 19-2= 14+0= 8+2= 2+13= 4-4= 16-4=
5+4= 3+1= 16-6= 2+15= 7-0= 17-5=