In this question, you're solving the expression by combining like terms.
Solve:
(-4y^3 - 5y + 16) + (4y^2 - y + 9)
Combine like terms
-4y^3 - 5y + 16 + 4y^2 - y + 9
-4y^3 +4y^2 - 6y + 25
You can't simplify it any further, so -4y^3 +4y^2 - 6y + 25 would be your answer.
Answer:
-4y^3 +4y^2 - 6y + 25
