In this series, the methodical preparation of the teaching material assumes that the user does not want to engage with mathematics as a science, but rather as a tool for solving the tasks and problems that arise in their field. Therefore, particular attention is given to those areas of content, mathematical methods, and procedures that are significant for the user. The theory is presented in a clear and easily understandable manner. Elaborate proofs and theoretical investigations are deliberately omitted. The main aim of the series is to provide the reader with numerous well-commented examples that offer guidance on how to approach problem-solving in order to quickly and reliably reach the correct result. A variety of tasks with solutions gives everyone the opportunity to improve their problem-solving skills.