Chances for Cornell, Dartmouth, CMU, Brown?

@comom25
@Unkn0wn1
@flowersanduniversities

Should I explain my medical reasons in my additional info section? I had surgery, and I missed several days of school up until the 10th grade (I had straight A’s ever since I had surgery).

Also, if anyone wants more specific info (e.g. what my Microsoft app was about / what exam I got perfect on / other minor awards), I can PM them.

Thank you so much for all of your responses. Does anyone else have any input?
BTW, I am planning to major in mathematics / operations research.