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I have here a strange problem I don't get. When using the fontspec package in combination with MnSymbol package all big brackets in math mode are square and opening... when I deactivate one of the packages the problem is gone!

Here an example of the problem:


% the next line makes the definition of \mathdollar from MnSymbol void.


Big brackets are messed up while normal brackets still work:
      1 & 2 & 3  \\
      1 & 2 & 3  \\
      1 & 2 & 3     
    = \left( \sum_{i=1}^{n-1} i \right)
    = \left( n \right)
    = \big( naaaarf \big)
    = (all fine) 

      \left[ \sum_{i=1}^{n-1} i \right]


And here the result: enter image description here

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up vote 7 down vote accepted

MnSymbol changes all the delimiter codes, but also fontspec does and later than MnSymbol, so the problem arises.

A possible solution is to load fontspec with the no-math option; another one is not using MnSymbol at all.


enter image description here

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