title: Basic LaTeX questions
body: <p>Two (hopefully quick) questions about LaTeX:</p>
  
  <ol>
  <li><p>How do you number select functions? I'm working in a <code>documentclass{article}</code>, if that matters. I want to have certain functions numbered such as</p>
  
  <pre><code>function1  
  function2 (1)  
  function3  
  function4 (2)
  </code></pre></li>
  <li><p>How do you make a sign to evaluate an integral? I know how to do brackets, but is it possible to only make one straight light to the right of the function with the bounds of integration? I can't figure out how to do that.</p></li>
  </ol>