
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
Consider a sequence ${a_n}$ where if $a_{n+1} = a_n + a_{n+2}$ for all $n \in \mathbb{N}^*$, then the sequence ${a_n}$ is called a "convex sequence." Given that the sequence ${b_n}$ is a "convex sequence" and $b_1 = 1$, $b_2 = -2$, find the sum of the first 2014 terms of the sequence ${b_n}$.

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