If you enter inside a text region ("...") numbers followed by a "-" (dash), this part of the text will be converted to a mathematical expression with minus sign and variables. This does not happen with the version 0.99.7610.

Thank you for the report! Will fix in the next beta-version.

Best regards.

Fixed. See https://en.smath.com/forum/yaf_postst20094_Beta--SMath-Studio-0-99-7681--11-January-2021.aspx