Mine

on *:TEXT:!tb*:#:{
  if ($nick isop $chan || $nick ishop $chan
  if (!$3 !isnum) {
    notice $nick You must supply in this format: !tb <nick> <minutes> <reason>
  }
  else {
    ban -ku $+ $calc( $3 * 60 ) $chan $2 2 Timebanned! Minutes: $3 Reason: $4-
  }
}