But in meaning "except". Impression of native language speakers. According the dictionary: 'but' means ‘except’ when it is used after words such as all, everything/nothing, everyone/no one, everybody/nobody. Let's consider the phrase: "we know no king, but King in the North". Do you anticipate that after the phrase "we know no king" there will be continuation (exception) or not?

LaTeX I suppose that everybody knows what Microsoft Word or LibreOffice is. We use those products for everyday work, especially if we are students, office workers or scientists. Reports, documents, articles and etc. When I were young student, I worked at a compilation of answers at ordinary differential equations exam. It was the tremendous Microsoft Office's document (about one hundred pages) with an unimaginable count of formulas. It hangs and crashes every hour. Today Microsoft Office is much better, than before. But in those days I thought, that I should find the alternative for writing the complicated documents, and I found it. It was LaTeX. It's difficult, it's really difficult in comparison with Microsoft Office or even LibreOffice. You should write a code and then compile this code to, for example, pdf. To understand how it works, just look at this online demo: https://papeeria.com/p/a37163d0-9326-4316-b5c8-a77ada5de74f#/main.tex But code didn't fear me. I am programmer, so I like that manner of work that LaTeX offers. It was not easy at start, but then I understand that I control all, I can write the very complicated document and change everything in it and nothing breaks. Lately I start generate the LaTeX documents programmatically (just generate its code and run compiler). Many people suppose that it's too difficult for everyday's tasks, maybe they are right, maybe not. But I can easily say, that it's the best tool for writing formulas, generate different documents and reports, preparing international research articles. And it's beautiful. I attached the some screenshots from my documents here (sorry, they are written in Russian)