Casio FX-991ES Plus 2nd Edition

The Casio FX-991ES Plus 2nd Edition is an advanced scientific calculator designed for mathematics, science, and engineering applications. With 417 built-in functions and a Natural Textbook Display, it allows users to view equations and results in the same format as textbooks, making complex calculations easier to understand. It supports advanced functions including matrix calculations, vector calculations, complex numbers, equation solving, integration, differentiation, statistics, regression analysis, table functions, and base-n calculations. The calculator features 10 + 2 digit display, 9 variable memories, multi-replay function, and dual solar & battery power for reliable performance. Its compact design and protective slide-on hard case make it ideal for students, teachers, engineers, and professionals.