Algebra-1

Question Analysis
This question tests the student's ability to add and simplify polynomials by combining like terms, a key skill in Algebra-1.

Key Concept Explanation
Adding polynomials involves combining like terms. Like terms are terms with the same variable and exponent. The coefficients of these like terms are added together.

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

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