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Description
Currently only multlined, \shortintertext, and the modified \intertext have specific luamml support. Nearly all of the commands and environments provided by mathtools are in the test files, so I won't list them all here unless that is helpful. Some should be fairly easy to implement since they are just variations of already-supported amsmath commands or environments. For example, I was able to modify the definition of \MT_smallmatrix_l_begin:, etc. just copying the modifications of smallmatrix in latex-lab-amsmath, however I couldn't figure out where to add the tagsupport/math/luamml/mtable/aligncol socket to get the alignment correct. Same for the starred matrix environments.