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Question: why not cancelling?

Question:why not cancelling?

Axel Vogt 5906
simplify fraction normal
August 28 2011
1 
Pi^2*(c+(1+Pi)/Pi)^2+Pi^2)/((c-(-1+Pi)/Pi)^2*Pi^2+Pi^2);

                         2 /    1 + Pi\2     2
                       Pi  |c + ------|  + Pi
                           \      Pi  /
                       ------------------------
                       /    -1 + Pi\2   2     2
                       |c - -------|  Pi  + Pi
                       \      Pi   /

I would expect Pi^2 to be cancelled out. Why it does not (Maple 15)?
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