
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
Given the requirement that students must choose 2 topics from the 4 topics in series four, in addition to completing the required mathematics content and elective series two in its entirety, calculate the number of different elective course schemes available to each student.

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