[Authors] P. B. Zatitskiy, A. I. Nazarov, D. M. Stolyarov [Title] On the formula of regularized traces [AMS Subj-class] 34L05 General spectral theory [Abstract] We obtain a new simple formula for the regularized traces of singular ordinary differential operator. [Keywords] regularized trace, spectral function, Green function [Comments] LaTeX, Russiam, 6 pp. [Contact e-mail] al.il.nazarov@gmail.com