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Thank you for your interest and for considering a purchase from us.This listing is for a CASIO fx-991EX CLASSWIZ advanced scientific calculator. Ideal for high school and university students, engineers, or anyone needing powerful computation, this calculator boasts a high-resolution LCD display and a comprehensive set of functions including calculus, statistics, complex numbers, and matrix calculations. It features both solar and battery power for reliable use. The calculator comes with its original protective hard case. Perfect for academic and professional use.