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Question: simplification example

Question:simplification example

acer 31285 Maple
simplification
October 16 2019
1

How could one simplify the following expression, preferably over z in large parts of the complex plane, and with few calls under different assumptions, and preferably gracefully.

expr := 2*Pi*(-z)^(1/2)-z^(1/2)*(2*ln(-z^(1/2))-ln(z));
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