Copy That от Henrik Nordberg

Math equations (MathML, KaTeX, MathJax, Wikipedia) are automatically converted to MS Office Math (OMML) format for native rendering in Word, OneNote, and PowerPoint. This solves the problem of copying contents with equations from a webpage to a word document and other office applications. A new feature now let's you select how equations should be copied. Options are: OMML, LaTeX, MathML, and Unicode.