To simplify the expression \(-1^2 - 16x - 13\):
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Calculate \(-1^2\): \[-1^2 = 1\]
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Substitute this into the expression: \[1 - 16x - 13\]
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Now combine the constants: \[1 - 13 = -12\]
So, the expression simplifies to: \[-16x - 12\]
Thus, the final simplified expression is: \[-16x - 12\]