Get the fx570es here: http://amzn.to/1TNSNP6
My new all-time favourite is now the Casio FX-991ES though: http://amzn.to/2pvLnsd (affiliate links)
What is the best calculator? fx-570 ES plus is such a powerful tool, and I just wanted to show off some of the basic, yet extremely useful things I do with it throughout my studies.
I roughly cover:
– Complex Numbers
– Simultaneous equations
– Integrals + Riemann Sums
– Base conversions
There’s much more info found in the manual.