Engineering student Sat 2 Scores help please...? :(

<p>Hi, I just got the following scores on my Sat 2s: Biology - 680, US History-690, Math 2 - 750.
I will be studying extremely hard for the Chemistry Subject Test in October. I am hoping to study engineering at Columbia, Stanford, or Princeton. Should I retake Math 2 and Bio? Columbia doesn't use score choice, which worries me....
are my scores good enough?
thanks!!</p>

<p>I would retake math. Dont worry 2400success will be coming out with a Chemistry and Math Level 2 guide soon.</p>