259+542=?,265+587=?,492+670=?
713-39=?,838-254=?,810-392=?
51+?=884,285+?=817,322+?=943
46*4=?,120*5=?,135*6=?
78/3=?,150/30=?,462/7=?
---
?-293=706-489,120+298+332+113=?
864-237=?+319,339+223+250-685=?
264+?+341=979,451+281-191-309=?
292+?-438=398,999-308-186-322=?
江枫渔火对愁眠