3 Standard mathematics symbols

What follows below is all of the symbols that we know to function correctly in the transformations explored. Use of any other symbol may result in output that cannot be read visually and / or that a screenreader / text-to-speech user cannot read. Please do not assume that all standard L^aT_eX  codes and AMS codes can be used, this is by no means the case. There are particular problems with negated symbols.