Instructions: Convert a disfluent question to a proper question. A disfluent question is a question that has some interruptions in it while framing. A proper question is the correct form of the question without any disfluency.
Input: How is the prime number p in Chebyshev's no, in Bertrand's postulate expressed mathematically?
Output:
How is the prime number p in Bertrand's postulate expressed mathematically?