Doobs please helpp, mah hw is too hard :,(, the question is: add the polynomial expressions using the horizontal format

Answer:
9s^3 + 13s
Step-by-step explanation:
Combine like terms and simplify.
(6s^3 + 3s^3) + (9s + 4s) + (10 - 10)
(9s^3) + (13s)
9s^3 + 13s