This file is indexed.

/usr/bin/rmath is in mathomatic 15.8.2-2+b2.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/bin/sh
# This shell script runs m4 Mathomatic (matho) with readline capability.
# Uses rlwrap program, if available, which is a readline front end.
# The rlwrap program may be obtained at
# http://utopia.knoware.nl/~hlub/uck/rlwrap/
#
# Usage: rmath [ input_files ]

MATHOPATH="${0%/rmath}/matho"
if [ ! -x "$MATHOPATH" ]
then
	MATHOPATH=matho
fi

if rlwrap -v
then
	rlwrap -H ~/.mathomatic_history "$MATHOPATH" "$@"
else
	echo readline support not loaded because rlwrap utility was not found.
	"$MATHOPATH" "$@"
fi