The Free On-line Dictionary of Computing (19 January 2023):

math-out

   (Possibly from "white-out", the blizzard variety) A paper or
   presentation so encrusted with mathematical or other formal
   notation as to be incomprehensible.  This may be a device for
   concealing the fact that it is actually content-free.

   See also numbers, social science number.

   [Jargon File]

   (1994-12-14)


The Jargon File (version 4.4.7, 29 Dec 2003):

math-out
 n.

    [poss. from ‘white-out’ (the blizzard variety)] A paper or presentation so
    encrusted with mathematical or other formal notation as to be
    incomprehensible. This may be a device for concealing the fact that it is
    actually content-free. See also numbers, social science number.

    [73-05-18]

    A math-out approach to history.