Thanks to all of you, finally i did it!!!
Thom*'s formula is great: <p class="calibre2"><sup class="calibre3">(.*?)</sup>
The group (.*?) changed with ([0-9]) for
1-9, ([0-9][0-9]) for
10-99, ([0-9][0-9][0-9]) for
100 to 999, makes the job.
Wow it look nice!!! And quickly.