<p>yes, I can definitely improve those two scores to 750+. </p>
<p>The only reason that I would retake all three is that I wouldn’t want to send those crappy scores from the last test date. Correct me if I am wrong, but I think when you send the scores, you have to send all of them that you took on a single date.</p>
<p>So I don’t really want admissions committees to see a 720 chem and 650 math, even if I have 3 good scores.</p>
<p>Most highly selective colleges want to see ALL scores from ALL dates, so they will see it regardless. Those that allow score choice are usually not ultra selective so for those, if you retake math, even if you send the low scores and the retake score, they will be good enough.</p>
<p>Do not, under any circumstances, retake US History.</p>