<i>so it shouldn&#x27;t be beyond reach of a motivated developer able to set aside some time to learn. MOOCs and organizing study groups with friends&#x2F;co-workers can help a lot here as well.</i><p>I&#x27;m in the middle of that process right now.  I only took Calc I in college and that was 20 years ago, so I have decided to work my way through a Calc sequence, Differential Equations, Linear Algebra, and Probability and Statistics through a combination of MOOCs, &quot;X For Dummies&quot; books, Youtube videos (hello, Gilbert Strang!), Schaum&#x27;s Outlines books, Khan Academy, a mammoth stack of college maths texts that I&#x27;ve picked up at used book stores, and questions on stats.stackexchange.com, math.stackexchange.com, learnmath.reddit.com, etc.<p>I&#x27;m doing the Ohio State MOOC on Calc I now on Coursera, and accompanying that with the Gilbert Strang &quot;Highlights of Calculus&quot; video series[1].  So far so good.  I definitely think  this stuff is learnable if one is willing to put in the time and work, even without going back to taking &quot;on campus&quot; classes at a university.<p>[1]: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;playlist?list=PLFW_V3qDH5jRyfpD9uiq6aKVTWIxpbIm3" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;playlist?list=PLFW_V3qDH5jRyfpD9uiq6...</a>