207+595=?,208+530=?,475+638=?
744-82=?,858-248=?,856-315=?
34+?=801,297+?=824,336+?=921
16*7=?,32*6=?,45*5=?
45/?=?,76/4=?,110/5=?
---
?-288=778-421,196+284+319+145=?
818-221=?+371,382+140+291-669=?
294+?+308=913,407+248-156-310=?
203+?-440=201,999-353-138-340=?
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