[nikofeyn]

you can do such a thing with matlab. many, many of the function calls and algorithms in matlab can be directly viewed.

and honestly, it seems like diving into sage may not be as trivial as you make it sound. is it not a massive glue of many different languages and implementations?

[jimhefferon]

The point is not that it is trivial, but that the system is set up so you can do it. This describes why that is important: http:/www.ams.org/notices/200710/tx071001279p.pdf.