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% !TEX program = xelatex\documentclass[11pt]{article}\setcounter{secnumdepth}{0}\usepackage{polyglossia}\usepackage{hyperref}\usepackage{amsmath}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{enumerate}\usepackage[version=4]{mhchem}\usepackage{chemfig}\setchemfig{atom sep=4ex}\usepackage{xfrac}\usepackage{geometry}\usepackage[utf8]{inputenc}\usepackage[T1]{fontenc}\usepackage{xcolor}\usepackage{colortbl}\usepackage{enumitem}\usepackage{tikz}\usetikzlibrary{quotes,angles}\geometry{a4paper,total={170mm,257mm},left=20mm,top=20mm,}\setmainlanguage[numerals=Devanagari]{bengali}\setotherlanguage{english}\newfontfamily\englishfont{Times New Roman}\newfontfamily\bengalifont[Script=Bengali]{Kalpurush}\newcommand{\drg}{^{\circ}}\newcommand{\bd}{\textbf}\newcommand{\eng}{\textenglish}\title {\eng{Physic Formulas}}\author{সোয়েব পারভেজ জীম}