Answer:
5a. 14w
6a. 8b2 - 5b + (-4)
7a. (-3x2) +9x - 4
8a. 3 + 0b
9a. 19 + 6a
Step-by-step explanation: it’s basically imagine that x is :) and y is :( you cant add :( to :) because they are different also the symbols in front of them show if it’s negative or positive