FullForm[...] in Maxima?



> 
> At the Maxima level, Maxima lets you manipulate either the internal form 
> or the external form:
> 
> part(x/y,0) => "/"
> inpart(x/y,0) => "*"
> or part(x/y,0), inflag:true => "*"
> 

Yes indeed, these commands indeed helped me one step further.  I did not 
realize getting the Head (MMA) of an expression as the zeroth part. 
Thank you!