This book is intended for students of the third grade of high school in the orientation group of Positive Sciences and the orientation group of Economics and Informatics.
It contains:
- Detailed theory.
- Observations on the theory, on which the answers to the questions and the solutions to the exercises are based.
- Methodology and comments for solving exercises.
- Solved exercises, as examples of the solution method.
- Exercises for solving.
- Topics that cover the entire spectrum of knowledge that the student must have in order to fully meet the exam requirements.
- Tests per teaching unit.

At the end of the book there are:
- The solutions to the exercises for solving in this book.
- National exam topics.