Theory of Complex Variable Functions and Operational Calculus : Methodical instructions to the standard calculation”, created by the team of authors, is a unique work that will become an indispensable assistant for students, graduate students and teachers studying mathematics and related disciplines . This work immerses the reader in the world of complex analysis and operational calculus, offering not only theoretical foundations, but also practical recommendations that will help to master complex concepts and methods. The book focuses on the theory of functions of a complex variable - one of the most beautiful and deep areas of mathematics. The authors aim to make complex ideas accessible by using understandable language and illustrative examples. Readers will be able to learn about the properties of analytic functions, Cauchy integrals, the deduction theorem, and many other key aspects that form the basis of complex analysis. The book not only presents the material, but also offers methodological guidelines that will help the reader to solve problems on their own and apply the knowledge gained in practice. This work will be especially interesting for those who study mathematics at the higher education level, as well as for those who are preparing for exams or scientific research. Students of technical and natural sciences will find in it useful information that will help not only in their studies, but also in their future professional activities. Teachers can use the book as a methodological tool for organizing the educational process and preparing lectures . The topics raised in the book cover a wide range of issues related to complex analysis and operational calculus. The authors emphasize the importance of these topics in modern scientific research and engineering applications. Readers will be able to see how theoretical knowledge is applied to real-world problems such as signal processing, control theory, and mathematical physics. This makes the book not only a tutorial, but also a practical guide for professionals. The style of the authors is distinguished by the clarity and logic of the presentation . They aim to make complex mathematical concepts more accessible by using examples and illustrations that help the reader better understand the material. Unlike many other textbooks, this book is not overloaded with theory, but offers practical tasks that contribute to the consolidation of knowledge and the development of skills. The team of authors includes experienced teachers and researchers who have extensive experience in mathematics and its applications. Their previous work has also received recognition in the scientific community, and this confirms the high level of quality of the material presented. Readers familiar with other publications will appreciate the consistency and depth of the presentation, as well as attention to detail. If you are looking for a book that will help you understand the theory of functions of complex variable and operational calculus, "Theory of functions of complex variable and operational calculus: guidelines for a typical calculation" is an excellent choice. It will become a reliable companion in your learning path and will open new horizons in understanding mathematics. Do not miss the opportunity to immerse yourself in the fascinating world of complex analysis and master its key concepts with this unique guide