Error occurs when inputting certain equation syntax causing access issue

[raararaara]

What happened:
When inputting the following equation syntax without enclosing it in a code block, an error occurs and the document becomes inaccessible.

$\begin\ca$

The error message "Something went wrong" is displayed, preventing access to the document.

What you expected to happen:
The equation syntax should be correctly processed without causing any access issues.

How to reproduce it (as minimally and precisely as possible):
You can check the case of documents that are inaccessible at this link.

1. Open a document.
2. Input the equation syntax $\begin\ca$ without using a code block.

Anything else we need to know?:
This issue seems to be related to how the equation syntax is interpreted and processed. Steps to reproduce the issue have been provided above.

Environment:

• Operating system:
• Browser and version:
• CodePair version:

[devleejb]

Related to remarkjs/react-markdown#853.