This book is intended for students of the 2nd grade of Lyceum in the orientation group of Positive Sciences.

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 how to solve them.
- Exercises to solve.
- Topics that cover the entire spectrum of knowledge that the student must have, in order to fully meet the requirements of the exams.
- Tests per teaching unit.
At the end of the book there are:
- The solutions to the exercises for solving this book.