Add the given polynomials using the horizontal format. 20 Points

Answer:
if you use calculator soup the answer is there :D
Step-by-step explanation:
answer is 3y²-9y+4
Step-by-step explanation:
first remove the brackets so
7y²-7y+7-4y²-2y-3
so
7y²-4y²-7y-2y+7-3
so u will get
3y² - 9y + 4
I hope this helped you