QUESTION 1)
8u + 9v + 3u - 5v
8u + 3u + 9v - 5v Bring the like terms together
11u + 4v Combine the like terms
8u + 9v + 3u - 5v = 11u + 4v
QUESTION 2)
15uv + 5u + 4v + 11u + 4v + 11u + 14v
15uv + 5u + 11u + 11u + 4v + 4v + 4v Bring the like terms together
15uv + 27u +12v Combine like terms
15 + 5u + 4v + 11u + 4v + 11u + 14v = 15uv +27u + 12v