16

I feel like the parentheses look strange here:

\begin{equation}
  uv=4\left(\frac{a}{2}\right)^2\left(\frac{b}{2}\right)^2=
  4\left(\frac{s}{2}\right)^2\left(\frac{t}{2}\right)^2
\end{equation}

Do people think they should have the same heights or be like this?

enter image description here

21

If you use \biggl and \biggr in place of \left and \right it looks great!

\begin{equation}
uv=4\biggl(\frac{a}{2}\biggr)^2\biggl(\frac{b}{2}\biggr)^2=4\biggl(\frac{s}{2}\biggr)^2\biggl(\frac{t}{2}\biggr)^2
\end{equation}

enter image description here

The reason why the brackets look a different size is because a and s are x-height letters, whereas b and t are ascenders, so in the latter case the fraction is "taller" and consequently so are the brackets.

  • 6
    \biggl and \biggr are better... – Andrew Swann May 14 '18 at 14:39
  • @AndrewSwann It didn't seem to make a visible difference, but good practice nonetheless! – angrydust May 14 '18 at 14:42
  • See tex.stackexchange.com/q/1232/15925 for the differences... – Andrew Swann May 14 '18 at 17:40
  • 1
    And some ^{\!\!2} in the exponent. I would use probably \Bigl( .. \Bigr) so it kind of depends on taste. – Manuel May 15 '18 at 5:46

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