
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
For \( n \in \mathbf{Z}_{+}, n \geqslant 2 \), let
\[ 
S_{n}=\sum_{k=1}^{n} \frac{k}{1+k^{2}+k^{4}}, \quad T_{n}=\prod_{k=2}^{n} \frac{k^{3}-1}{k^{3}+1} 
\]

Then, \( S_{n} T_{n} = \) .

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