
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
Among the following 4 events: ① Adding two numbers with opposite signs, resulting in a negative sum; ② Subtracting two numbers with opposite signs, resulting in a positive difference; ③ Multiplying two numbers with opposite signs, resulting in a positive product; ④ Dividing two numbers with opposite signs, resulting in a negative quotient. The certain event is ______, and the random event is ______. (Fill in the event numbers accordingly)

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