title: How do you make parentheses match height when they're split between lines in LaTeX math?
body: <p>Consider the following example</p>
  
  <pre><code>\begin{equation}
      \begin{split}
          f = &amp; \left( \frac{a}{b} + \right. \\
                     &amp; \left. c \right) + d 
      \end{split}
  \end{equation}
  </code></pre>
  
  <p>In the result, the left parenthesis on the first line is very large, because of the fraction inside. In the second line, since there is no fraction, the parenthesis is small. </p>
  
  <p>How can I make the one on the second line match the one on the first line in height?</p>