Answer:
Third choice
Step-by-step explanation:
Add and subtract like terms:
-2xy - 6xy = -8xy
-8y - 2y = -10y
-4y^4 + y^4 = -3y^4
Combine them together, and you get:
-3y^4 - 8xy -10y
3)
1. Remove brackets
2. add like terms (-8y and 2y)
3. copy the un-addble terms behind
