
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
$$ C_{ 5 }^{ 3 }+ C_{ 5 }^{ 4 }= C_{ \boxed{6} }^{ 4 } $$, then the number in the box is $\boxed{6}$.

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