
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
Inside a convex 7-sided polygon, we mark 10 points so that in the set $H$ consisting of the 7 vertices of the polygon and the marked points, no 3 points are collinear. Then we triangulate the heptagon in such a way that the set $H$ is exactly the set of the vertices of the triangles. What can be said about the number of triangles formed?

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