3.29.3 Can you answer these questions?

3.29.3.1 fixcmex does not fix
3.29.3.2 Missing \endcsname inserted. when \foreach \nextgroupplot
3.29.3.3 Package titlesec Error: Unknown shape

Can you answer these?

3.29.3.1 fixcmex does not fix

https://tex.stackexchange.com/questions/387295/fixcmex-does-not-fix

The fixcmex package is supposed to restore the cmex font and make it scaleable using several sizes provided by amsmath, even if the lmodern package has been loaded which overrides it with the lmex  ...
 
- asked by wea0 3votes
3.29.3.2 Missing \endcsname inserted. when \foreach \nextgroupplot

https://tex.stackexchange.com/questions/386988/missing-endcsname-inserted-when-foreach-nextgroupplot

I try to generate a lot of plots, organized in a groupplot, automatically. Unfortunately, \foreach seems to have a problem with the \nextgroupplot macro. 
\documentclass{standalone} 
...
                                                                                  

                                                                                  
 
- asked by Chickenmarkus 2votes
3.29.3.3 Package titlesec Error: Unknown shape

https://tex.stackexchange.com/questions/387901/package-titlesec-error-unknown-shape

I am trying to modify the basic article class section headers so that the main section level is centered and has the format "1. XXXXX ".  To accomplish this I am trying to use the titlesec package.   ...
 
- asked by Bocephus85 1vote