[texhax] help with identifying some macros

[P. R. Stanley]

>ok, as Philip Taylor & Donald Arseneau observe, \[...\] is the LaTeX 
>way of writing $$...$$. \also may be a Spivey-defined macro. I think 
>rather than understanding the remaining plainTeX constructs, Paul 
>Stanley wants to know what you see if you are able to:
>
>>         Paul: Correct. for those who don't know already, I am 
>> registered blind which means that I can't simply run the code 
>> through the Miktex compiler to find out what the macros do.

LaTeX is the most accessible system for typsetting maths but the end 
result is usually the exact opposite. So any help from the list 
members is always very welcome

Regards
Paul