I find the notation in the formulae extremely misguiding. All variables are user-dependant, yet for some reason the superscript x appears in every variable in t

I find the notation in the formulae extremely misguiding. All variables are user-dependant, yet for some reason the superscript x appears in every variable in the formula instead of being factored out. In math, superscripts usually mean exponentiation. The formulae are really simple. Just take out the x completely and consider everything to be in the context of a single user. And that's not even considering the many drawbacks of these calculations. The main one being that it encourages a lot of commenting when we don't necessarily need everybody commenting all the time, but rather when they have something useful to add to the discussion.