package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)([^\s]*\s*)\\rem\{(?:lp|db)\}(\{((?>[^{}]|\n|(?2))*)\})(\s?[^\s]*)`)
var str = `
Some text etc word\rem{lp}{ more text {\ce{O2}} further text {\ce{H2O}} . some other text the $m = 48$ ({\ce{O2}}) ps}.
\rem{lp}{ more text {\ce{O2}} further text {\ce{H2O}} . some other text the $m = 48$ ({\ce{O2}}) ps
where more text {\ce{O2}} further text {\ce{H2O}} . some other text the $m = 48$ ({\ce{O2}}) ps from
who more text {\ce{O2}} further text {\ce{H2O}} . some other text the $m = 48$ ({\ce{O2}}) ps.}
\rem{lp}{ more text {\ce{O2}} further text {\ce{H2O}} . some other text the $m = 48$ ({\ce{O2}}) ps.
more text {\ce{O2}} further text {\ce{H2O}} . some other text the $m = 48$ ({\ce{O2}}) ps.}
\subsection{other}
Our bla bla bla`
var substitution = "$1\\textcolor{red}{\\underline{<<ReTe>>}}$4"
fmt.Println(re.ReplaceAllString(str, substitution))
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/