When I was using LibreMath on windows 10 I noticed that instead of the normal brackets and parentheses the program used a telephone/ phone symbol. A similar replacement occurred with some of the generic functions in the program. I was wondering if there was a way to change the symbols back to normal.
Check that you have font Open Symbols installed on your system.
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Thank you! installed the font and it works now.
This is hopefully fixed for good in 7.0 with tdf#128226.