See MINSE in action on these pages:
'deriv(f(x), x) = 'lim((f(x+h)-f(x))/h, h->0)
Write that one expression in one of your documents, and people who visit with a text-based browser will see:
while people visiting with a graphical browser will see:d f(x + h) - f(x) ---- f(x) = lim ----------------- dx h -> 0 h
You get both renderings for free when you supply the expression structure. It should also be possible to render out a MINSE expression to speech or to a form usable by other programs, such as Maple or TEX, because the meaning of the expression is preserved.
This makes mathematics more accessible than ever before.
http://lfw.org/math/nph-pmpm.cgi
Please feel free to send me your thoughts about this proposal!