The simplified expression is:

$-14x^2 + 9x + 2$

Would you like more details on any part of this solution? Here are some related questions:

1. How do you simplify polynomials like this step by step?
2. What are the rules for combining like terms in algebra?
3. Can you explain how the distributive property works in this context?
4. How can this simplified polynomial be factored?
5. What are some common mistakes to avoid when simplifying polynomials?

Tip: Always distribute any negative signs or subtraction carefully when simplifying expressions.