There are thousands of great examples on this site. Search for posts by Aladin Akyurek, Marcelo Branco, markmzz, Barry Houdini, pgc01, T Valko, wideboydixon to just name a few. XOR LX has his own page with great examples too: https://excelxor.com/
Not sure if you are looking for matrix (array) formulas in general or matrix functions in Excel for matrix math. If actual the ladder then here are are some links.
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