
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
What is the sum of all numbers in the following square matrix?
$$
\begin{array}{l}
1, 2, 3, \ldots, 98, 99, 100 \\
2, 3, 4, \ldots, 99, 100, 101 \\
3, 4, 5, \ldots, 100, 101, 102 \\
\ldots \\
100, 101, 102, \ldots, 197, 198, 199
\end{array}
$$

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