<p>I’m not familiar with the kinds of equations used in econometrics. From the Xthink’s web site, there are examples of the kinds of mathematical functions that the program can handle.</p>
<p>See: [url=<a href=“http://www.xthink.com/mathjournal_advanced.html]xThink[/url”>http://www.xthink.com/mathjournal_advanced.html]xThink[/url</a>]</p>
<p>See: [url=<a href=“http://www.xthink.com/mathjournal_solutions_other.html]xThink[/url”>http://www.xthink.com/mathjournal_solutions_other.html]xThink[/url</a>]</p>
<p>And, of course, you can use MS OneNote, one of the best note-taking programs available for students (for typed or handwritten notes on a Tablet PC).</p>