Question: evaluate difficult function

Dear Community,

I would like to evaluate this difficult function:  

Unfortunately when I try to define it in Maple, I always get an error message. I tried it in many different ways, but always failed. See also the attached workbook. Can someone pls. have a look, what I do wrong?

Tx for your kind help in advance,

best regards

Andras

DifficultFunction.mw

 

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