In my opinion, it puts too much emphasis on the variables compared to the operators and numbers and makes the expression as a whole harder to parse at a glance as I have to actually read the names.
Yeah, when doing it with hand, I surely would shorten it. But when doing math on the computer with help of autocomplete, why not?
But well, I do not really know if that in pure math shape exists, I am only doing Math in the context of programming.
And for pedagogic purposes, I do would like more meaningful names at times.
It's definitely a lot harder to read and make sense of an equation that is sprawled out. In some domains, I would contend that using greek letters in code would increase readability, especially for those familiar with the underlying formula, and especially if the code is not edited frequently (e.g. implementing a scientific formula which won't change).
A good compromise might be to put the equation in the comments in symbol-heavy form, and use the spelled out names in code.
