The manual is intended for effective preparation for state final certification and external independent assessment. The publication is a collection of tasks that correspond to the program of external study. In terms of form, it is a task with the choice of one correct answer, a task for establishing correspondence (logical pairs), structured tasks, open tasks with a short answer, open tasks with an extended answer. solving A detailed solution is provided for the first (basic) task of the block, accompanied by comments, definitions, theorems, etc. The second and third tasks of the block are intended for independent solving. Answers to all tasks are given._x000D__x000D_Intended for graduates of general secondary education institutions, applicants, students of pedagogical higher education institutions, mathematics teachers.