Answer:
a³ - 5a² + 4a + 5
Explanation:
To solve this, remove the parentheses. If you were subtracting the two phrases, you would distribute the negative sign to the second phrase, but you are adding so you will not have to do this
4a - a³ - 3 + 2a³ - 5a² + 8
a³ - 5a² + 4a + 5