Looking for documentation package

[Gary L. Roach]

I have been looking for a documentation system that would allow me to 
write cursive paragraphs with math formulas interspersed and then have 
the formulas solved. Some examples that almost do what I want is Sage, 
Octave and Cantor (with the proper backend). So far all seem to be 
missing the /* text */ capability of the C language and have no 
subscript superscript capability. I like Cantor a lot but haven't been 
able to get around these two hurdles. Could anyone help.

Gary R