Check the question again. There might be some misprint. If the question is as given, there are no such fractions.
Let the required quotient be xx2-1 where x is a natural number. The given info:
x+2x2+1 > 23 ---- This gives x = 1, 2
0 < x-3x2-4 < 110 ---- This gives x ≥ 4.
So the two equations cannot be simultaneously satisfied.