Wolfram Mathematica (usually termed Mathematica) is a modern technical computing system spanning most areas of technical computing — including neural networks, machine learning, image processing, geometry, data science, visualizations, and others. The system is used in many technical, scientific, engineering, mathematical, and computing fields.
Link to the resource: https://account.wolfram.com/redeem/COVID19
Access to the resource: The system calculates automatically from the moment of registration.
Instructions: follow the link, register, after registration you will be able to choose the option to work in a browser (Web), through a mobile application (Mobile app) and by installing software on your personal computer (select Windows, Linux or Mac).