Hi. I was wondering if anyone would share with me some insight about what calculator I should purchase? I'm a returning student in the fall, majoring in physics with engineering option. It's been so long since I've been in school though that I may end up having to take a trig/algebra II class and pre-calculus before even getting to calculus. So, I may need something for trig/alg, pre-calc, calc, physics and engineering. Thanks for your advice.