If your are lost on the command line, you can ask Eq for the available commands
$ eq help
EqManips 0.2 command list
cleanup Perform trivial simplification on formula
eval Try to evaluate/reduce the formula
exacteval Try to evaluate/reduce the formula, without performing lossy operation
format Load and display the formula in ASCII Art
interactive Invoke Eq as an interactive prompt
latexify Translate the formula into latex
mathmlify Translate the formula into MathML
toraw Show internal representation of formula
help Ask specific help for a command, or this
preprocess Parse a source file and apply inline action in it
demathmlify Try to transform a MathML Input to EQ language
show Try to retrieve some information about supported options
If you want further information for the show command by example, just type the following :
$ eq help show
EqManips 0.2 command list
Try to retrieve some information about supported options
--functions Ask for defined function list
--operators Ask for defined operator list
--languages Ask for supported languages for the preprocessor