I am the author of an open source language translator called transpiler-generator.
Here's a list of interesting questions on Stack Overflow that I will answer soon:
8 Is $d^2y/dx$ a valid mathematical notation? Aug 27 '13
3 Determine whether the span of one set of vectors contains the span of another set of vectors Jun 3 '12
2 Find the span of a set of vectors Dec 7 '12
1 Is a matrix in row echelon form if the leading ones do not have a perfectly diagonal shape? Oct 14 '12