WTB: Math problem solving script

[Phronesis]

I'm looking for bids on a math problem solving scripts for a website I'm building. Particularly looking for algebra problem solving scripts but other types of math would be welcome as well. Please let me know if you think you can do this and what you would charge. Some examples of what I'm looking for can be seen here:

webmath.com
algebra.com
solvemymath.com

Feel free to post or PM questions.
Thanks,
Tom