Both Brown and Dartmouth require 2 SAT subject tests, but i don’t have time to retake then and I did really badly on them (math 2:730, literature 640), will these tests ruin me if my SAT 1 is 2340?
Probably not if you have great grades and essays.
Bump
If it’s too late to retake them or to take another subject test, your only hope for admission is to apply with the scores you have. Those are your scores. Send them in, write good essays, and hope for the best.
Literature is low for those two schools, but I wouldn’t say you did poorly on math at all. If it’s too late to retake them, don’t worry about it. If the rest of your application is strong, I doubt those scores will hurt you. Whatever happens, happens. Ivy admissions are a crapshoot, anyway. Don’t sweat it! 