I have two *.tex files (let say main.tex and subtex.tex). I want to include the "subtex" in the main file. The accepted answer to this question might work but the problem is that the "subtex.tex" use its own class (\documentclass[letterpaper]{myclass.cls}) so I cannot use
\documentclass[main.tex]{subfiles}
in the "subtex". any other method that can help?
\addtocounter{page}{?}and inserting the other document pages by hand -- Oh the good old days! – Donald Arseneau Nov 13 '20 at 09:46