Mathpix Snip: Scanner App for Math and Science
Mathpix Snip digitizes handwritten or printed text, and copies outputs to the clipboard that can be pasted into LaTeX editors like Overleaf, Markdown editors like Typora, Microsoft Word, and more.
Available for MacOS, Windows, Linux (Snap), iOS, and Android.
N.B.: Using this to copy equations from Wikipedia is 100% pointless, because you can also just select the equation with your mouse and press CtrlC, which will put the LaTeX source of that equation in your clipboard.