- while (regex_replace(t, t, REGEX_BOS "\\\\(((footnotesize|tiny|scriptsize|small|large|Large|LARGE|huge|Huge|emph|noun|minisec|text(bf|md|sl|sf|it|tt))|((textcolor|foreignlanguage|latexenvironment)\\{[a-z]+\\*?\\})|(u|uu)line|(s|x)out|uwave)|((sub)?(((sub)?section)|paragraph)|part|chapter)\\*?)\\{", "")
- || regex_replace(t, t, REGEX_BOS "\\$", "")
- || regex_replace(t, t, REGEX_BOS "\\\\\\[", "")
- || regex_replace(t, t, REGEX_BOS " ?\\\\item\\{[a-z]+\\}", "")
- || regex_replace(t, t, REGEX_BOS "\\\\begin\\{[a-zA-Z_]*\\*?\\}", ""))
+ while (regex_replace(t, t, "^\\\\(((footnotesize|tiny|scriptsize|small|large|Large|LARGE|huge|Huge|emph|noun|minisec|text(bf|md|sl|sf|it|tt))|((textcolor|foreignlanguage|latexenvironment)\\{[a-z]+\\*?\\})|(u|uu)line|(s|x)out|uwave)|((sub)?(((sub)?section)|paragraph)|part|chapter)\\*?)\\{", "")
+ || regex_replace(t, t, "^\\$", "")
+ || regex_replace(t, t, "^\\\\\\[", "")
+ || regex_replace(t, t, "^ ?\\\\item\\{[a-z]+\\}", "")
+ || regex_replace(t, t, "^\\\\begin\\{[a-zA-Z_]*\\*?\\}", ""))