I have been using Khicas for a bit and it works pretty well for what I need.

However I cannot do certain partfrac which involve anything but a 1 on the numerator side and results in just an expanded equation with no partfrac.

Below I have attached a link
Does anybody know how I should be forming them before putting it into partfrac, or is there some limitation whereby it can't do more complicated partial fraction?

Thank you
https://imgur.com/a/OrlEeMg

Hi, it looks like you have operation precedence issues here. This is what KhiCAS reads:

9x² + 25x + (16/9)x² - 16

which is just a normal polynomial, so partfrac() performs no transformation. Did you want this instead?

(9*x^2 + 25*x + 16) / (9*x^2 - 16)

This new expression gives 1 + (49/18 ) / (x-4/3) + (1/18 ) / (x+4/3) in Xcas for Firefox.