Answer:
7y² + 9y + 1
Step-by-step explanation:
(13y - 10 + 7y²) + (11 - 4y)
= 13y - 10 + 7y² + 11 - 4y
= 7y² + 13y - 4y + 11 - 10
= 7y² + 9y + 1
