217+548=?,293+537=?,473+602=?
735-92=?,854-229=?,865-327=?
73+?=896,265+?=892,330+?=979
46*4=?,38*6=?,78*3=?
480/6=?,729/9=?,512/6=?
---
?-276=716-441,141+201+312+134=?
844-219=?+376,380+256+283-604=?
293+?+361=903,430+295-179-331=?
279+?-454=292,999-335-196-395=?
清泉石上流