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10. Calculate the difference of two integers

1. \((-6)\) \(-\) \((-87)\) \(=\)

2. \((-39)\) \(-\) 38 \(=\)

3. 92 \(-\) \((-16)\) \(=\)

4. 57 \(-\) 34 \(=\)

[Note: Insert minus sign if your answer is in negative]

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