
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
Fifteen students are enrolled in both history and geography classes. There are 30 students taking history. There are 18 students who are taking only geography. How many students are taking history or geography but not both?

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