5+1= 9+3= 14+5= 8+1=
4-4= 8+9= 3+1= 8+8=
11-11= 5+2= 10+2= 14-6=
13+2= 9-7= 14-10= 17-6=
9-6+8= 9-7+5= 4-4+8= 9+7-6=