This is continuations of the discussion from here.
tag-excerpt for algebra-precalculus: says linear, exponential, logarithmic, polynomial, rational, and trigonometric functions, conic sections, binomial, surds, graphs and transformations of graphs, equation- and system-solving, and other symbolic-manipulation topics
Based on this I think it is fine for anything about various manipulations with expressions. So I use it that way.
I don't think that the deciding whether a question belongs to this tag or not should be based mainly on what is taught in precalculus classes in the USE. (People from other countries would not be able to use that tag.)
