
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
Laura starts collecting shells on the beach. She collects two shells on the first day and increases the number of shells she collects by three every subsequent day. How many shells will she have collected at the end of the fifteenth day?

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