9+10= 13-10= 18-8= ( )+5=15
14-4= 10+2= 15-10= ( )-2=10
==
10+1= 10+4= 10+9= 10+7=
10+2= 10+8= 10+6= 10+3=
14-4= 17-7= 16-6= 19-9=
12-2= 15-5= 11-1= 13-3=
□○□=□ □○□=□