We're doing Stanford AI Class as a group.
To keep track of the solutions and steps to solve the more complicated problems, we suggest using using Octave (for math programs) and MathML (for recording the equations).
The Octave programs and equations are on GitHub
Feel free to check out and edit, adding comments and additional material that we can review before the exams. If you are not in the GitHub XinCheJian organization, create your user and send Ricky your username. The directory has a README.md with more informatoin