11.68.3 Can you answer these questions?

11.68.3.1 MTPro2 braces in cases not working in Lualatex

https://tex.stackexchange.com/landing/r/digest?cta=question&id=752038

In question here Ruixi Zhang showed a patch to the MTPro2 package that fixes a problem with the choice of curvy braces in the {cases} environment. But the code using his patch: 
\documentclass{report} 
\... 
[luatex] [mtpro2]
 

asked by Knudsen https://tex.stackexchange.com/landing/r/digest?cta=user&id=129514 Score of 3

11.68.3.2 Node with boxsep=false - Overlapping text

https://tex.stackexchange.com/landing/r/digest?cta=question&id=752107

In this little example, I would like the red oval to be below the word "a" as the M of "MWE". Is it possible ? 
\documentclass[12pt]{article} 
\usepackage[T1]{fontenc} 
\usepackage{... 
[pstricks] [pst-node]
 

asked by F... https://tex.stackexchange.com/landing/r/digest?cta=user&id=105335 Score of 3

answered by kabenyuk https://tex.stackexchange.com/landing/r/digest?cta=user&id=204924 Score of 0

11.68.3.3 empheq: flush group numbering to the left

https://tex.stackexchange.com/landing/r/digest?cta=question&id=752134

I have a tex file (taken from this answer) 
\documentclass[reqno]{amsart} 
\usepackage{mathtools,hyperref} 
\hypersetup{ 
colorlinks=true, 
linkcolor=blue, 
} 
\usepackage[overload]{empheq} 
\begin{... 
[cross-referencing] [mathtools] [empheq]
 

asked by Akira https://tex.stackexchange.com/landing/r/digest?cta=user&id=161639 Score of 1