
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
Laura and her 3 siblings, including her youngest brother who is only 10 years old, are about to receive new cellphones for their birthdays. The family has decided that no child should have the same service provider and there are 25 service providers in total. However, due to age restrictions, the youngest brother can choose from only 15 providers. How many different ways can their parents choose service providers for their children under these conditions?

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