The CEO's sudden resignation threw the board into a tailspin.
What does the idiom "threw into a tailspin" mean?
The politician's vague answers clearly showed he was just beating around the bush.
What does "beating around the bush" imply?
Simplify the following expression: $ \frac{2^{n+5} - 4 \cdot 2^{n}}{2 \cdot (2^{n+4})} $.