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Question: why is Maple confused/

Question:why is Maple confused/

awass 296 Maple
simplification
September 10 2013
0

HERE IS A FUNCTION THAT I WANT TO DIFFERENTIATE

where f(y) satisfies a second order ODE. After simplification Maple returns

which is way too complicated. Maple is distinguishing between cos(f(y)) and cos f(y). In my worksheet I consistently write cos(f(y)). Any ideas?

 

Here is an expression as Maple writes it after simplification

Thanks,
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