
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
Insert two numbers between 2015 and 131, so that these four numbers are arranged in descending order, and the difference between any two adjacent numbers is equal. What is the sum of the two inserted numbers?

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