
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
Given a sequence of numbers: $1$, $-2$, $3$, $-4$, $5$, $-6$, $7$, $\ldots$ Arrange these numbers in the following form:<br/>Row $1$: $1$.<br/>Row $2$: $-2$, $3$.<br/>Row $3$: $-4$, $5$, $-6$.<br/>Row $4$: $7$, $-8$, $9$, $-10$.<br/>Row $5$: $11$, $-12$, $13$, $-14$, $15$.<br/>$\ldots$<br/>Following the above pattern, what is the $6$th number from the left in the $100$th row?

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