Introducing the Casio FX-991EX Ultra - a powerful scientific calculator with a high resolution display for increased information and lightning fast calculations. Perfect for high-stakes testing or advanced mathematics, it also features advanced calculations for integration, differential calculus, and more. With added functions such as spreadsheet capabilities and statistical calculations, this calculator is suitable for middle and high school students as well. Trust the Casio FX-991EX to handle all your mathematical needs with precision and efficiency.