Algebra-1

Question Analysis
This question tests the ability to subtract polynomials by changing the signs of the terms in the subtrahend and then combining like terms. 

Key Concept Explanation
To subtract polynomials, change the sign of each term in the subtrahend and then combine like terms. Only like terms can be combined.

Step-by-step Solution
1. Start with the expression:
2. Change the signs of the terms in the subtrahend:
3. Combine like terms:

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