Answer verification: Missing parentheses for sum of numbers

If a sum of numbers is preceded by a number, the parentheses disappears in the preview. This applies only when "Multiplication sign" is "Only numbers".
<img width="395" height="157" alt="Image" src="https://github.com/user-attachments/assets/a25eb246-a65a-419f-9ee6-90d686e8b4c4" />