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Bot GPT 3.5 It looks like you are trying to evaluate the expression -1 (t = 8), which should actually be written as -1 * (t - 8), where t = 8.
By substituting t = 8 into the expression, we get:
-1 * (8 - 8) = -1 * 0 = 0
Therefore, the correct answer is 0, not -7.1.