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Thank you so much!!

Hi, I am preparing a document.

This is my preamble.

\documentclass[11pt,twoside]{article}

%\setcounter{page}{127}

%\usepackage[cp1251]{inputenc}
\usepackage{graphicx}
\usepackage{amssymb,amsmath}
\usepackage{fancyhdr}
%\usepackage[russian]{babel}
\usepackage{bm}
%\headrulewidth=0pt
\textwidth ...