title: How to make some letters in string BOLD
body: <p>I'm looking for an easy way to make some letters in a label bold.
  I have a string like this:</p>
  
  <pre><code>String r = "y = "+output0+" "+output1+"sin(x) "+output2+"cos(x)";
  </code></pre>
  
  <p>and a label:</p>
  
  <pre><code>Label s = new Label(r);
  </code></pre>
  
  <p>and I need to make the "y" and "sin(x), cos(x)" bold. I tried using HTML, but it didn't work (maybe i was using it wrong). If I set font for that label, then the whole label is bold (including those outputs) which is not what I need.</p>