Question on finding eta expansions

["LNU, Swati" <S10@email.sc.edu>]

Hello,

I am trying to find the expansion of the eta quotient f(z) = \eta(7z) \eta(z)^2 in fractional powers of q^(1/24) and I tried the following code:

D(n) = {q^(9/24) * eta(q^7 + O(q^(n+1))) * eta(q + O(q^(n+1)))^(2) ;}

I am getting the incorrect output.

Could someone help in this regard?

Thanks,

Swati

"The pursuit of science is at its best when it is a part of a way of life" - Alladi Ramakrishnan.