Description:
I have a strange bug in Writer. If I create a formula via Insert > Object > Formula... such as:

P left (B divides D right ) = sum from {k = 1} to {k} {P} left (B divides {M} rsub {k} , D right ) P left ({M} rsub {k} divides D right )

It appears to be normal. When I save as a .docx, then close and reopen the document, the formula has changed to

P left (B | D right ) = sum from {k = 1} to {k} {P} left (B | {M} rsub {k} , D right ) P left ({M} rsub {k} | D right )

The divides have been changed to | in the formula itself. The | then render as a weird 'V'. This error does not occur when saving as an .odt file. 

System info:

Version: 6.2.0.3
Build ID: 98c6a8a1c6c7b144ce3cc729e34964b47ce25d62
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk3; 
Locale: en-AU (en_AU.UTF-8); UI-Language: en-US
Calc: threaded
OS: Ubuntu 18.04

Steps to Reproduce:
1.Create formula in Writer using 'divides' syntax
2.Save as .docx
3.Close Writer
4.Reopen document

Actual Results:
'divides' syntax has been replaced with |, which does not render.

Expected Results:
'divides' should remain as the syntax.


Reproducible: Always


User Profile Reset: No



Additional Info:
Version: 6.2.0.3
Build ID: 98c6a8a1c6c7b144ce3cc729e34964b47ce25d62
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk3; 
Locale: en-AU (en_AU.UTF-8); UI-Language: en-US
Calc: threaded
OS: Ubuntu 18.04