Show HN: Mathcha – Online Mathematics Editor
Nothing here attracts me away from pure LaTeX that much except two things: (1) built-in symbol recognition (I still rely on <a href="http://detexify.kirelabs.org/symbols.html" rel="nofollow">http://detexify.kirelabs.org/symbols.html</a> but it's rare for me to have to look something up) and (2) auto-resizing delimiters.<p>Can any TeX experts explain to me why delimiters don't resize by default? Why do we need to insert so many \left and \right commands?