To simplify the expression B, we can start by multiplying both the numerator and the denominator by the common denominator of 4n - 23. This will help us eliminate the fraction.

B = (5n - 17) / (4n - 23)

Multiplying both the numerator and the denominator by 4n - 23:

B = (5n - 17) * (4n - 23) / (4n - 23)

Expanding the numerator:

B = (20n^2 - 115n - 17) / (4n - 23)