
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
**Mary can mow a lawn in three hours, and Tom can mow the lawn in five hours. If they start mowing the lawn together but Tom leaves after 1.5 hours, how much of the lawn remains to be mowed?**

Revised

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