This is a screenshot from one of the papers of the Dozenal Society:
I'd like to ask, how you can do those arrows in LaTeX as they did in their equations.
A couple other things: Are those three math environments in a minipage that has been split into three?
And I'm guessing the way to do the justification is an
align* environment with the
& in the appropriate locations?
Primary questions are those arrows though. I never used them, but I'd sure like to know how to do those like that.