Math 6

Question Analysis
This question tests the understanding of subtracting a negative integer. The key concept is that subtracting a negative number is equivalent to adding its positive counterpart.

Key Concept Explanation
When subtracting a negative number, you convert it to addition of the positive counterpart. The formula for this is .

Step-by-step Solution
1. Identify the operation: The expression is .
2. Convert subtraction of a negative to addition:

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