Math & Science ⇒ Fractions and automatically scaled Brackets

[latexhelp1]

How do you include brackets, [] with fractions, so that they are the same size? Currently, the brackets are smaller than the fraction, and I would like for the two to be the same:

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[\frac{1}{2}]

I would very much appreciate your help!

[Stefan Kottwitz]

Use \left and \right for delimiters with automatic size:

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\left[\frac{1}{2}\right]

Stefan