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.
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.