Question
Evaluate: $(24 \div \overline{12-9}-12)-(3 \times 8=4+1)$
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Answer
$\begin{aligned} & (24 \div \overline{12-9}-12)-(3 \times 8=4+1) \\ & \Rightarrow(24 \div 3-12)-(3 \times 2+1) \\ & \Rightarrow(8-12)-(6+1) \\ & \Rightarrow-4-7 \\ & =-11\end{aligned}$
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