TY JOUR TI Methodological Features of Preparation for Solving Economic Problems of the Unified State Exam in Mathematics KW mathematical training KW mathematical economics KW unified state examination KW teaching content KW typical error KW formalization KW modeling JO Scientific Research and Development. Socio-Humanitarian Research and Technology AU Vlasov, D.A. AU Sinchukov, A.V. PY 2020 IS 9 PB INFRA-M Academic Publishing LLC.