
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
Liam read an average of $40$ pages per day for the first three days and an average of $50$ pages per day for the next three days. On the seventh day, he attended two reading sessions: during the first session, he read $15$ pages, and in the second session, he read twice as many pages as in the first session, and the total number of pages in the book is unknown.

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