
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
Consider the polynomial expression $(5x + 2)^7$ expanded in the form $b_7x^7 + b_6x^6 + \cdots + b_0$. Find the sum of the coefficients, $b_7 + b_6 + \cdots + b_0$.
A) 128
B) 823543
C) 16807
D) 5764801
E) 40353607

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