2+5= 3+6= 4+4=
3+5= 4+4= 1+6= 1+8=
4+2= 5+4= 3+2= 2+7=
6+2= 4+3= 3+6= 7+1=
( )+ 5 = 9 1 +( ) = 7 4 +( ) = 8
3 +( ) = 8 ( )+ 4 = 6 ( )+ 4 = 7