
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
Consider the sequences \[C = 1 \times 2 + 3 \times 4 + \cdots + 41 \times 42 + 43\] and \[D = 1 + 2 \times 3 + \cdots + 40 \times 41 + 42 \times 43.\] Find the positive difference between integers $C$ and $D$.

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