
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
Express in the form of an irreducible fraction:

$$
6 \frac{16}{2015} \times 9 \frac{17}{2016}-2 \frac{1999}{2015} \times 17 \frac{1999}{2016}-27 \times \frac{16}{2015}
$$

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