The textbook was written in accordance with the higher mathematics program for software technicians in the specialty L 1735, approved by the Ministry of Higher and Secondary Special Education of the RSFSR. The book includes theoretical material that is necessary for a programmer in his practical activities. Differential equations, boundary value problems and integral equations are considered. The material is presented in an accessible manner, detailed conclusions are given. A large number of examples are included, accompanied by detailed solutions. At the end of each chapter there are examples and tasks for self-solution.