It looks like you've provided a sequence of numbers: 14, 15, 21, and 35. Could you clarify what you need help with? Are you looking for a pattern, or would you like assistance with something specific related to these numbers? Let me know, and I’d be happy to assist!

Here are some possible things we could explore:

1. Identifying a pattern or sequence between these numbers.
2. Finding the next number in the sequence.
3. Exploring their mathematical properties (such as factors, primes, etc.).
4. Calculating the differences between consecutive numbers.
5. Performing a specific operation involving these numbers.

Tip: If you're trying to find a pattern, sometimes it helps to look at differences between consecutive terms or consider the numbers' prime factorizations.