neqn - format equations for ascii output
neqn [eqn options]
The neqn program is actually just a shell script which invokes the eqn(1) command with the ascii output device. Note that eqn does not support low-resolution, typewriter-like devices (although it may work adequately for very simple input).
eqn(1) Groff Version 126.96.36.199 27 June 2001 NEQN(1)