
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Evaluate the expression $2^{-(2k+3)} - 2^{-(2k-3)} + 2^{-2k}$.
**A)** $-\frac{55}{8} \times 2^{-2k}$  
**B)** $\frac{55}{8} \times 2^{-2k}$  
**C)** $-\frac{65}{8} \times 2^{-2k}$  
**D)** $\frac{1}{8} \times 2^{-2k}$  
**E)** $0$

Present the answer in LaTex format: \boxed{Your answer}
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