arranging and conducting of educational courses for students in the field of math; organisation and conducting of educational courses for students in the field of mathematics; organisation and conducting educational courses for students in the field of mathematics; organisation and conducting educational courses for students in the field of math; arranging and conducting of educational courses for students in the field of mathematics

organisation and conducting of educational courses for students in the field of mathematics; organisation and conducting educational courses for students in the field of mathematics; organisation and conducting educational courses for students in the field of math; providing courses of instruction in the field of mathematics