Some of the functionality you will find in the fx-300ES Plus includes: Natural Textbook Display shows expressions and results exactly as they appear in the textbook Multi-Replay function allows you to backtrack step-by-step through calculations allowing the ability to edit expressions and recalculate answers Simplify Fractions & Roots Repeating Decimal Display Prime Factorization GCD/LCM Logarithm of any base Combinations & Permutations Statistics & Linear Regression 9 Constant Memory locations And much more! Hardware Features The fx-300ES Plus is intuitive and easy to use as you progress through your coursework. It has two-way power Solar Plus with Battery Back-up so you re always ready! Large Display Offers a large multi-line display that allows for important multi-replay functionality.