
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 Fibonacci sequence is a famous sequence in the history of mathematics. In the Fibonacci sequence $\{a_n\}$, $a_1=1$, $a_2=1$, and $a_{n+2}=a_{n+1}+a_n$ $(n\in\mathbb{N}^*)$. Find $a_7=$ _______; If $a_{2019}=m$, then the sum of the first $2017$ terms of the sequence $\{a_n\}$ is _______ (express your answer in terms of $m$).

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