I'm a biochemistry major (chemistry focused, not biology focused program) and I have just completed the fall semester of my junior year. I completed my first semester of physical chemistry (chemical thermodynamics) and I really enjoyed the mathematics. My major only requires calculus 1 and 2, even though physical chemistry required some basic multivariable which I learned on my own. I would like to take multivariable calculus and differential equations, as I am liking the look of more quantitative graduate programs in biochemistry, and I will be working as an undergraduate research assistant in a biophysical chemistry laboratory this spring semester. The problem is that I have not taken calculus since my freshman year, and even though I received an A in calculus 1 and 2, I don't want to crash and burn if I take multivariable calculus and differential equations because I've been away from the material for so long. Has anybody else been in this boat? Does the material come back to you easily? Any comments or suggestions?