If ES plus is the type of calculator you want, fx-991EX classwiz is a more capable version in every way except maybe the price. If you don't want a graphing calculator, programming and CAS on it, the fx-991EX is one of the best, if not the best scientific calculator out there (haven't seen many, though).
Includes beautiful UI (roots, exponents and fractions are displayed like we write them, so more is visible, and the navigation is easier), spreadsheets, printing out values of a real function, solving any real equation for X (one solution at a time, gotta give it different starting Xs for optimization, though), some very basic probability (Gauss) statistics (e.g. linear regression), up to 4x4 matrices, finding derivative in a point, sum over a range, integral over an interval, arithmetic with complex numbers etc.
It doesn't render graphs, but, it renders a qr code that a phone can scan and then the phone shows the graph, so some graphing is there for studying, but not an exam.