
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
Rectangular cardboard with dimensions of 25 units by 35 units has square corners with each side measuring 6 units removed. After removal, the edges are folded up to form an open box. Determine the surface area of the interior of the box.
A) 686 square units
B) 731 square units
C) 775 square units
D) 831 square units
E) 875 square units

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