1 10 55   Reduce output
  This menu function saves results of symbolic
calculation into files. For each subprocess the
file sum#.red is created, where # is the subprocess
number. So, for the more typical case of one
subprocess, the result will be written in the file
sum1.red.
  The output file contains algebraic expressions for
all diagrams of the subprocess, written in the notation of
the symbolic manipulation system REDUCE.