sign and mark does not show correctly

[mehraz]

Hi
 i'm a new user of Octave.I am using  the latest version of octave(5.2.0) 
and window 10 x64.

I have some trouble to work with octave specially in symbolic package.

when i want to use symbolic package, some of sign and mark appear in
different way, like infinity sign that shows with oo or when i use matrix,
the sign of matrix is different
<https://octave.1599824.n4.nabble.com/file/t373696/2.png> 
please help me solve these problems.
best regards, mehraz



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