(TO_DAYS(dateadded)-TO_DAYS(Now())>=-$newdateadded)

##</code><code>##

(
  N # number of days from 0 for a date presumably in the past
  -
  M # number of days from 0 to now
) # will yield a negative number
>=
-O # some number of days, but negative

##</code><code>##

( ( TO_DAYS(dateadded) - TO_DAYS(Now()) ) >= -42 )

##</code><code>##

( ( TO_DAYS("2020-03-01") - TO_DAYS("2020-03-17") ) >= -42 )
##</code><code>##

(737850 - 737866) >= -42)