You might be better picking an area, and trying to work out the notation relating to that area e.g. vectors / matrices / calculus etc. As Colin says below there

You might be better picking an area, and trying to work out the notation relating to that area e.g. vectors / matrices / calculus etc. As Colin says below there are often multiple equivalent ways of representing things across different fields and timeframes. I seem to remember maths I studies in Elec Eng looking different but equivalent to the way it was represented in other disciplines