Crafted with special features, this FX991ES Plus Scientific from Casio is a perfect companion that will help you make lengthy calculations with great ease. This calculator includes many advanced features that make calculating easier to input, view and calculate! It includes 417 functions which enables you to carry out various mathematical calculations including statistics, logistics, equations, matrix and many more. It includes a textbook display pattern which enables the user to have a better view and understanding of the calculations on it's high resolution screen. Many people also face issues of forgetting their previous work and this leads to many issues, but this scientific calculator has a recall and re-execute feature which allows you to instantly go back, view and edit your formulas, which is perfect for students.