公式识别问题

[noenif]

Before you asking

• I have searched the existing issues
• I spend at least 5 minutes for thinking and preparing
• I have carefully checked the issue, and it is unrelated to the network environment.

Environment

- BalbelDOC:https://app.immersivetranslate.com/babel-doc

Describe the bug

To Reproduce

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior

No response

Relevant log output and screenshots

Origin PDF file

Calculus, Metric Edition_1000-1050.pdf

Anything else?

No response