This document is a port (with a few additions) to LaTeX of the document https://www.tug.org/texshowcase/cheat.pdf produced and written in plain TeX. That original TeX document was written by Steve Seiden. The purpose of the port to LaTeX is to make it possible to use the document to test some Unicode math fonts and unicode TeX more easily. This seems to be difficult with Plain TeX where the use of a font other than the Computer Modern fonts seems to be awfully complicated.