thanks starbucks and sigh
i was trying to do a while with $regex and $regsub, but it dont works (maybe i have made a mistake)
i will try your while, sigh, it seems to be what i need
about the factorial (its "fac" in english? i suggest $fat because here i say "fatorial",
), let me dream a little. what about an $calc_ext that is a little more slow but can do operations with large numbers?
(ok, its nonsense
)
