"Mathematics Workshop . Book 2. Part III-IV" is a unique manual that will become an indispensable assistant for students, schoolchildren and anyone who seeks to deepen their knowledge in the field of mathematics. This work, created by a team of authors, is aimed at the practical development of mathematical concepts and methods, which makes it an ideal choice for those who want not only to understand the theory, but also to learn how to apply it in practice. The book covers a wide range of topics, ranging from algebra to elements of mathematical analysis. Each task in the manual is carefully selected and structured, which allows the reader to gradually increase the level of complexity and self-confidence. Unlike many other textbooks, here the emphasis is not only on solving problems, but also on the development of logical thinking and analytical skills. This makes the book especially valuable for high school students preparing for exams, as well as for students studying mathematics at a deeper level. Since the "Workshop" is focused on the practical application of knowledge, it will be of interest not only to those who study at school or university, but also to those who are preparing for Olympiads or competitions in mathematics. If you’re looking for a way to improve your problem-solving skills, build confidence, and prepare for important exams, this book will be your faithful companion. It is suitable for a wide range of readers, including schoolchildren, students and even adults who want to refresh their knowledge. One of the key features of this manual is its interactive approach. Each topic is accompanied not only by theoretical materials, but also by practical tasks that will help to consolidate the studied . This makes the learning process more fun and effective. Readers will be able not only to memorize the formulas, but also to apply them in various situations, which will significantly improve the understanding of the subject. Topics raised in the book range from basic concepts to more complex concepts such as functions, equations, and inequalities. Each section ends with practical tasks that will help the reader to test their knowledge and skills. This creates a unique opportunity for self-testing and analyzing one's own successes. In addition, the manual provides solutions and explanations for problems, which allows you to understand the solution process more deeply and avoid common errors. The style of the authors is characterized by accessibility and clarity of presentation, which makes the material understandable even for those who are faced with mathematics for the first time. The team of authors includes experienced teachers and practicing mathematicians, which guarantees the high quality and relevance of the material presented . If you are familiar with other works of this team, you know that they always strive to make mathematics interesting and accessible to everyone. "Mathematics Workshop . Book 2. Part III-IV" is not just a collection of problems, but a whole system aimed at developing mathematical thinking and self-confidence. This book will be a great addition to the learning process, as well as help you prepare for exams and Olympiads . If you are looking for a high-quality, hands-on math tutorial that will help you succeed, don’t miss the opportunity to get acquainted with this wonderful work.