Handheld scientific calculator features up to 228 different functions. Ideal for basic algebra and trigonometry and scientific calculations. Two-tier display shows formulas and results simultaneously. Separate square, cube, X to the Y power keys, independent square root and cube root keys. Offers nine variable memories. Also performs single variable statistical calculations, order of operations M-D-A-S, six levels of parentheses, Polar-rectangular conversions, DMS<>DD,P<>R , mean, standard deviation, permutations and combinations.