try $remove($17,$chr(91),$chr(93),$chr(41)) sicne you want to remove the [,] & )

Here is a $gettok solution (its not the only token solution)
$gettok($gettok($17,1,91),1,93)

First $gettok($17,1,91) makes "[number])" become "number])" since leading tokens seperators 91=[ are dumped

Second $gettok( XXX ,1,93) makes "number])" become "number" since the first token seperator is now 93=]