&gt; it sure would have been easier to have done it in my 20&#x27;s<p>Not necessarily.  It might have required less determination to go along with what others around you were doing, but a lot of people who try learning subjects like calculus as adults report that it seems easier.  They have better focus, and most important, they understand why they are doing it.<p>In short: it&#x27;s never too late!  Study on!