Stacked fractions

From Why start at x, y, z

A fraction written on multiple levels is often ambiguous, especially when handwritten. For example, \(\frac{10}{\frac{2}{5}}\) and \(\frac{\frac{10}{2}}{5}\) result in 25 and 1, respectively.

Things get even worse when you use the letter \(\Xi\) in this convoluted example[1]:

A handwritten stacked fraction with Xi bar divided by Xi. In effect it looks like nothing more than a stack of eight horizontal lines of varying sizes.
\(\frac{\bar \Xi}{\Xi}\), handwritten