489+336=?,267+402=?,472+761=?
700-71=?,944-637=?,978-164=?
55+?=867,294+?=798,323+?=919
20*7=?,6*119=?,882*4=?
294/3=?,440/8=?,846/9=?
---
?-297=891-444,166+131+496+143=?
736-225=?+332,529+390+282-977=?
262+?+327=948,421+480-224-377=?
239+?-555=492,999-288-151-469=?
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