I have an engineers understanding of higher maths - overly general and very patchy. Short of taking an undergraduate math course, are there any resources to help me parse math notation? For example, while brushing up on endogeneity/exogeneity, E[B'|X] = 0 completely threw me - I had to search Google for the use cases of a bar/pipe aka latex vert/mid. I usually lose interest in a paper if I get stuck trying to decode the syntax.
Also, if I were you, I would always look up introductory textbooks before trying to read math literature. The example you gave is conditional probability; any textbook on probability theory would cover it.
