Answer:
2xy+5m+5
Explanation:
3xy+2m+9-xy+3m-4=(3xy-xy)+(2m+3m)+(9-4) =2xy+5m+5
3xy +2m +9 -xy +3m -4
add and subtract like terms
=3xy-xy+2m+3m+9-4
=2xy+5m+5
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