Step-by-step (how this entry was formed):
- Author: corporate author is "Art of Problem Solving" (left as given-name-first since no personal name inversion is needed).
- Title: italicised per AGLC4 bibliography style.
- Date/publisher: omitted because none is provided — do not insert placeholders.
- Online resource: include the live URL but (per your instruction) do not include an access date.
- List: present as an unnumbered list and ensure duplicates are removed.
- Art of Problem Solving, Alcumus https://artofproblemsolving.com/alcumus.
Notes: This follows AGLC4 ordering for bibliography items while using the specific constraints you requested (given-name-first where applicable, italicised title, no placeholders for missing information, no access dates, and an unnumbered list).