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This is an interactive mathematics application that is open-source and provides practical tools for geometry, algebra and calculus.

GeoGebra is a free and open-source mathematics software that allows users to create mathematical objects in geometry, algebra, and calculus. The software has a user-friendly interface and provides tools to add points, vectors, lines, curves, and functions. It also allows users to perform calculations with numbers, angles, and matrices. The software supports π and Euler constants and includes options for adding text messages and images.