We are given the expression (5v² + 3v + 9) - (4v² + 2v - 5) + (-8v² - 8v + 8), and are told to simplify. First, we can use the distributive property to get rid of all the paranthesis. This gives us 5v² + 3v + 9 - 4v² - 2v + 5 - 8v² - 8v + 8. Now, just combine like terms. This gives us -7v² - 7v + 22, which is our answer. Hope this helps and have a phenomenal day!