As an engineer and not a mathematician, I'm interested most often in getting symbolic solutions to various equations. But when I enter an equation, say, for |a| where a is a complex equation for the frequency response of a filter, Maple simply returns "|a|". Well, I knew that! What I want is the symbolic equation of the magnitude of the frequency response, not a parroting of what I just typed. I have yet to find the command that will give me this. The help file is less than helpful in this regard. "How do I ..." seems focused on obtaining numerical solutions, not symbolic solutions, for example. I find that it's usually much quicker to just do the math on paper.