
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
The sixth, seventh, and eighth terms of an arithmetic sequence are 8, 13, and 18, respectively. What is the sum of the first six terms of this sequence?

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