Answer:
4y^2 - 10y + 23
Step-by-step explanation:
(22 - 7y + 6) - (-4y² + 3y + 5) = 22 + -7y + 6 + 4y² - 3y - 5
= 22 + 6 - 5 - 7y - 3y + 4y²
= 23 - 10y + 4y²
