3xy + 5yz, 2xy - 2yz, 4xy +5yz
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Answer:
9xy+8yz
Step-by-step explanation:
(3xy +5yz)+(2xy-2yz)+(4xy+5yz)
3xy+5yz+2xy-2yz+4xy+5yz
3xy+2xy+4zy-2yz+5yz+5yz
9xy+8yz
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