Add the polynomials $$(6y^3 - 4y + 9) + (2y^3 + 3y - 5)$$ an...

Question Analysis
This question assesses the ability to add polynomials by combining like terms.

Key Concept Explanation
When adding polynomials, identify and combine like terms (terms with the same variables and exponents).

Step-by-step Solution
1. Start with the given expression:
2. Group like terms: