How do you make the parentheses size of combination brackets larger?

I used the code


and the result was my result but the parentheses weren't tall enough to cover the whole combination. Is there any way to get the parentheses to fit the height of the combination; to get the parentheses covering the floor function too? Or is this normal?

  • Welcome to TeX.SX! Can you add a minimal compilable example?
    – egreg
    Commented Feb 18, 2015 at 17:54
  • You get a much better result anyway with \dbinom{\floor{x/2}}{2}. As a rule, one should avoid stacked fractions in (generalized) fractions whenever possible.
    – egreg
    Commented Feb 18, 2015 at 21:42

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