The Casio FX-991ES Plus 2nd Edition Pink Scientific Calculator is a powerful non-programmable calculator designed for students, teachers, engineers, and professionals. Equipped with 417 built-in functions, a Natural Textbook Display, and a clear dot-matrix screen, it allows mathematical expressions and results to be displayed exactly as they appear in textbooks for easier understanding. The calculator supports advanced calculations including algebra, trigonometry, statistics, matrices, vectors, complex numbers, integration, and differentiation. Its dual power system (solar and battery) ensures reliable performance, while the stylish pink design and slide-on hard case provide both durability and portability.