Please help answer all of them! for BRAINLIEST and more!! (Question In picture)

Answer:
2
A)-7y^3-3y^2-2y-8
B)-7x^3y^3-12x^2y^2-xy
C)2xy^3+3xy^2-5
3
A)14x^2
B)15a^2+30ab
Step-by-step explanation: