64+?=435,293+?=689,324+?=947
331-87=?,642-153=?,885-456=?
367+328=?,289+542=?,319+636=?
56/7=?,24/3=?,42/?=?
12*5=?,14*4=?,20*3=?
---
?-363=744-137,127+233+362+256=?
786-241=?+239,368+153+258-573=?
185+?+242=835,325+273-127-412=?
239+?-453=208,999-305-247-333=?
独与碧云还