10.43.3 Can you answer these questions?

10.43.3.1 Transform a 3D surface mesh

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=309622

I have a 3D surface mesh of a proximal femur in a .stl format. 
The stl can be downloaded here 
https://filesender.renater.fr/?s=download&token=a94a01f4-4710-4643-9003-c3c56a6b38b6 
I would like to ... 
[geometry] [stl-format]
 

asked by moi moi https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=104197 Score of 2

10.43.3.2 Finding regions where function is real

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=309584

I have a function of multiple variables, something like this or similar: 
... 
[equation-solving] [symbolic] [complex]
 

asked by Luca https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=85902 Score of 1

answered by Roland F https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=92018 Score of 0

10.43.3.3 Boxes to expression

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=309615

I have defined MakeExpression as below and I could convert boxes to my expression. But I couldn't get the expected expression, if I attach "-1" or "-"  in front of boxes. Could I ... 
[output] [boxes] [input]
 

asked by Soon https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=78050 Score of 1