#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "(?m)\<span\sclass\=\"js_value\stab-weather__value_l\"\>\s*+([+-]\d++)\s*+\<span\sclass\=\"tab-weather__value_m\"\>\s*+([.,]\d++)(?:\s*+\<\/span\>){2}"
Local $sString = "<span class="js_value tab-weather__value_l">" & @CRLF & _
" +6<span class="tab-weather__value_m">,2</span></span>" & @CRLF & _
"<span class="js_value tab-weather__value_l">" & @CRLF & _
" -12<span class="tab-weather__value_m">.45</span></span>" & @CRLF & _
"<span class="js_value tab-weather__value_l">" & @CRLF & _
" +0<span class="tab-weather__value_m">,1</span></span>"
Local $sSubst = "$1$2"
Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst)
MsgBox($MB_SYSTEMMODAL, "Result", $sResult)
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 AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm