To add the expressions \((7m + 8) + (-3m - 2)\), we can simplify step by step:
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Distribute the addition: \[ (7m + 8) + (-3m - 2) = 7m + 8 - 3m - 2 \]
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Combine like terms for the \(m\) terms: \[ 7m - 3m = 4m \]
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Combine the constant terms: \[ 8 - 2 = 6 \]
Putting it all together, we get: \[ 4m + 6 \]
Thus, the result of the addition is: \[ \boxed{4m + 6} \]