
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
Find the derivative of the function \( u = x y + y z + 1 \) in the direction of the vector \( \bar{l}\{12 ; -3 ; -4\} \) at any point and at the points \( A(0 ; -2 ; -1) \) and \( B(3 ; 3 ; 5) \).

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