Is there a Copy-and-Paste List of Popular Math Formulas?
I am just discovering LaTeX as a way of making worksheets and blog posts for my math classes. I already have my Wordpress installation setup to use MathJax. I would need to make the same formulas over and over again, so it would make sense if there was a plain text file somewhere where someone had written out popular math formulas (standard deviation, area of a circle, z-test, etc) that I could just copy and paste into my class notes.
Does such a thing exist?