85+?=733,463+?=852,381+?=966
493-65=?,773-117=?,828-364=?
343+427=?,203+575=?,451+694=?
16*5=?,31*7=?,10*10=?
21/?=?,84/3=?,120/5=?
---
?-347=720-435,185+223+304+127=?
843-256=?+315,343+157+262-615=?
283+?+323=958,463+205-128-347=?
204+?-426=295,999-313-159-311=?
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