91+?=272,58+?=324,175+?=466
136-53=?,383-148=?,421-295=?
173+159=?,28+285=?,157+214=?
4*5=?,6*3=?,7*9=?
18/2=?,27/3=?,36/4=?
---
?-138=354-129,73+86+42+222=?
337-200=?+73,168+51+128-305=?
87+?+91=257,153+99-71-132=?
124+?-77=269,500-48-206-164=?
屋漏不可支