You cannot call the rating with additional templates, unless you define them in other columns. What I intended to say is that, if you want to calculate a rating based on different criteria, calibre gives us the platform for defining columns for each data and, later, a column with functions/templates using them.
I didn't mean that there are already templates but you can create them (everything you have included in your post are basic arithmetic operations.... if you have the data, the key problem as always).
Sorry if I've mislead you, but I tend to write all my messages assuming a common background
