Infinite 7 is a textbook for lower secondary school mathematics. In this book, you learn about mathematical operations, basic concepts of geometry and algebraic expressions as well as equations and how to solve them. In addition, you will get a chance to use the GeoGebra application and programme with Python. In each chapter, there are clearly stated goals that let you know what the aim of your studies is. To support your learning, you can also use the digital materials that accompany this textbook.