Created attachment 204864 [details]
Test.oper.Formula.-.Right-hand.Forward.Slash[Incorrect].docx

1\. Open attached DOCX. Compare with working ODT.

(Also see comparison GIF.)

On the right-hand side, the formula should look like a vertical:

b
/
a

- - -

BUG: In LibreOffice 25.8.4, it appears as a:

b
=
a

and this in Word 365 (Version 2511, Build 19426.20218):

b
⬚
a

where:

- LibreOffice 25.8 = EQUALS SIGN instead of a FORWARD SLASH.
- Word 365 = a "missing" DOTTED SQUARE instead of a FORWARD SLASH.

- - -

NOTE: This ODT and DOCX was created by:

0\. Open LibreOffice Writer.

1\. Insert > OLE Object > Formula Object

2\. This is the raw LibreOffice Math formula:

int from a to b f(x) dx = oper / from a to b F(x) newline
int from {a} to {b} {f} left (x right ) dx "="  csup {b} csub {a} F left (x right )

- - -

NOTE #2: Both LibreOffice and Word 365 opened the ODT version of the formula correctly. Only the DOCX had this issue.

- - -

NOTE #3: This exact bug was reported by the user wywhsoycd on the LibreOffice subreddit:

- https://www.reddit.com/r/libreoffice/comments/1pxggkk/libreoffice_vs_msoffice/nwcmy75/

- - -

Tested in:

Version: 25.8.4.2 (X86_64)
Build ID: 290daaa01b999472f0c7a3890eb6a550fd74c6df
CPU threads: 8; OS: Windows 11 X86_64 (build 22631); UI render: Skia/Vulkan; VCL: win
Locale: en-US (en_US); UI: en-US
Calc: threaded