To simplify the expression \((-8 - 7i) + (7 + 6i)\), you can combine the real parts and the imaginary parts separately.
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Combine the real parts: \[ -8 + 7 = -1 \]
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Combine the imaginary parts: \[ -7i + 6i = -1i = -i \]
Putting it all together, we get: \[ (-8 - 7i) + (7 + 6i) = -1 - i \]
Thus, the simplified form is \(-1 - i\).