Question: How can I simplify an equation?

Hi guys, I am new on maple I have a simple question for you.

Let's say  A:=b^2*c

Then let's say D:=A*x

Maple give me as result something like D:=b^2*c instead of D:=A*x

And let's say E:=D*F I get E:=b^2*c*x*F instead of E:=A*x*F

My equation is more complicated than these but the problem is the same.

I hope I was clear in the explanation of the problem :)

Thanks :) 

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