This is a cheat sheet for writing mathematics with LaTeX. It is aimed at US undergraduates.
When I asked my students for feedback on LaTeX the consensus was that it is pretty easy but they need a list of symbols. This is my response. Besides including all the symbols they should need, there is some general advice about writing mathematics in LaTeX and a few examples taken from their classes. It prints on two sides of a US letter sheet.
You can get the PDF or the source.
This document is Free.
LaTeX Math for Undergrads by Jim Hefferon is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. It is based on a work at http://joshua.smcvt.edu/undergradmath/undergradmath.zip.
You may be interested in my other Free materials, including my Linear Algebra, and my Introduction to Proofs: an Inquiry-Based Approach.