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Question: fraction simplification

Question:fraction simplification

spark1631 60 Maple 18
June 15 2015
1

I have a expression: (x-2)/(x-2) and I want to retrieve all the variables of this expression.

I tried the following commands:

1. indets(expr, name);

2. indets(numer(expr),name);

but all i get is an empty set...it seems that maple will first simplify the expression and then figure out what variables are related to the given expression.

 

Is there any workaroud to achive what i want?

thanks
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