The "Unicode Nearly Plain-Text Encoding of Mathematics" standard[0] can do this just fine. :) a_0+1/(a_1+1/(a_2+1/(⋱+(1/a_n ) ))) Past that into an editor tha

The "Unicode Nearly Plain-Text Encoding of Mathematics" standard[0] can do this just fine. :) a_0+1/(a_1+1/(a_2+1/(⋱+(1/a_n ) ))) Past that into an editor that accepts the spec, and you'll get something like http://imgur.com/a/7hBwv http://imgur.com/a/7hBwv Disclaimer: I work @Microsoft improving on some math features, and we are the main implementors of the spec. Which makes me sad, since it is an open spec and it is really powerful! [0]http://unicode.org/notes/tn28/UTN28-PlainTextMath-v3.pdf http://unicode.org/notes/tn28/UTN28-PlainTextMath-v3.pdf