Hi! I’ve done a lot of research in high school, written about it profusely in my activities and essays, and gotten a SLOR (have no idea how good it is though). My questions are as follows:
(1) Should include abstracts in additional information? I have hard arguments on either side and have no idea what to believe.
(2) Can/Should I send in papers in any way?
Thank you 
In past application cycles, they stated specifically that they do not want anything extra:
Some applicants have included in additional info. If they were accepted, my guess is they got in despite sending abstracts, not because of it. In general, AO’s won’t understand the material, and if they don’t consider it, then they will not forward onto a faculty member who would be in a position to evaluate.
For other colleges that might accepts supplementary materials, don’t send in a research report; nobody has time to read it. Send an abstract, and if someone wants the full report based on the abstract, they will ask.