7y³-8y²(9y,4y²-6y³-y+9
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Answer:
Answer
(2y
2
+7y+5)+(3y+9)+(3y
2
−4y−3)
=2y
2
+3y
2
+7y+3y−4y+5+9−3
=5y
2
+6y+11
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