<p>Our site is dealing with electronics and practical engineering, so we use formulas in questions and answers on occasion, most usually when we have to figure out electronic ratings. </p>

<p>When we talk about the <a href="https://3dprinting.stackexchange.com/questions/760/analytic-equations-to-make-algorithm-of-3d-printer">design</a> or <a href="https://3dprinting.stackexchange.com/questions/631/how-are-delta-movements-calculated">function</a> of printers more than "rule of thumb", we need complex math. When we estimate <a href="https://3dprinting.stackexchange.com/questions/4472/how-is-the-print-time-of-an-object-to-be-printed-estimated?s=4%7C17.5425">print times</a> formulas could be used to illustrate the calculations. When we want to estimate the <a href="https://3dprinting.stackexchange.com/questions/6557/is-the-110m-length-accurate-for-3-0mm-1k-spool">length of a spool of filament</a>, we need math. When we discuss <a href="https://3dprinting.stackexchange.com/a/5155/8884">movement paths</a>, we also come into need for 3D geometry which can be simplified by using non-carthesian coordinates or functions - which in turn need manual typing of greek letters or proper formulas to be displayed well. </p>

<p>Up to now I have been typing LaTeX formulas in online converters and copy paste the link to the image generated formula. This is quite labor intensive, especially since the SE does support built in MathJax.</p>

<p>A recent <a href="https://3dprinting.stackexchange.com/a/6540/5740">answer</a> showed LaTeX/MathJax code in the answer, but that did not render into an actual formula image as it is not enabled.</p>

<blockquote>
  <ul>
  <li>Supply voltage $ U_S = 12V \or 24V $</li>
  <li>Logic Voltage $ U_L = 5V $</li>
  <li>Sensor Voltage $ U_sens = U_L$</li>
  <li>Temperature control (Hotend/Bed/Cooling fans) $ U_T = U_S$</li>
  </ul>
</blockquote>

<p>Why can't we enter formulas directly in posts?</p>

[{'answer_id': 339, 'author': 'Trish', 'author_id': 8884, 'author_profile': 'https://3dprinting.meta.stackexchange.com/users/8884', 'pm_score': 2, 'selected': False, 'text': '<p>MathJax would be really helpful:</p>\n\n<p>We recently discussed <a href="https://3dprinting.stackexchange.com/questions/6832/how-is-infill-generated-via-slicing/6836#6836">How is infill generated via slicing?</a> and the answer is linear algebra. Displaying linear algebra without formulas is a PITA.</p>\n'}, {'answer_id': 345, 'author': 'Jon Ericson', 'author_id': 5, 'author_profile': 'https://3dprinting.meta.stackexchange.com/users/5', 'pm_score': 4, 'selected': True, 'text': '<p>$$\\text{3D Printing Stack Exchange} \\subset \\text{Stack Exchange sites that use MathJax}$$</p>\n\n<p>There are <a href="http://data.stackexchange.com/3dprinting/query/879802/mathjax-inline" rel="nofollow noreferrer">~17 posts</a>  that could use an edit. Most of those are prices that have been converted into MathJax. You can fix that by escaping the dollar sign:</p>\n\n<pre><code>$ =&gt; \\$\n</code></pre>\n\n<p>I\'ll work on those edits myself, but I\'d love to get some help.</p>\n'}]
['https://3dprinting.meta.stackexchange.com/questions/314', 'https://3dprinting.meta.stackexchange.com', 'https://3dprinting.meta.stackexchange.com/users/5740/']