8+3= 10+7= 9-6= 9+9= 10-2=
9-5= 13-10= 8+7= 5+6= 2+5=
8-0= 3+6+6= 8-3+7= 9+5-10= 17-7-8=
3+( )=13 ( )+9=16 14-( )=10
( )-5=5 5+8=( )+( )