\documentclass[11pt]{report} \usepackage{arcs} \parindent 0pt \pagestyle{empty} \begin{document} $\overarc[.1]{AB}\ \overarc[.2]{AB}\ \overarc[.3]{AB}\ \overarc[.4]{AB}\ \overarc[.5]{AB}\ \overarc[.6]{AB}\ \overarc[.7]{AB}\ \overarc[.8]{AB}\ \overarc[.9]{AB}\ \overarc{AB}$\par \vspace{2ex} $\overarc[.1]{ABC}\ \overarc[.2]{ABC}\ \overarc[.3]{ABC}\ \overarc[.4]{ABC}\ \overarc[.5]{ABC}\ \overarc[.6]{ABC}\ \overarc[.7]{ABC}\ \overarc[.8]{ABC}\ \overarc[.9]{ABC}\ \overarc{ABC}$\par \vspace{2ex} \overarc[.1]{ABC}\ \overarc[.2]{ABC}\ \overarc[.3]{ABC}\ \overarc[.4]{ABC}\ \overarc[.5]{ABC}\ \overarc[.6]{ABC}\ \overarc[.7]{ABC}\ \overarc[.8]{ABC}\ \overarc[.9]{ABC}\ \overarc{ABC}\par \vspace{4ex} $\underarc[.1]{AB}\ \underarc[.2]{AB}\ \underarc[.3]{AB}\ \underarc[.4]{AB}\ \underarc[.5]{AB}\ \underarc[.6]{AB}\ \underarc[.7]{AB}\ \underarc[.8]{AB}\ \underarc[.9]{AB}\ \underarc{AB}$\par \vspace{2ex} $\underarc[.1]{ABC}\ \underarc[.2]{ABC}\ \underarc[.3]{ABC}\ \underarc[.4]{ABC}\ \underarc[.5]{ABC}\ \underarc[.6]{ABC}\ \underarc[.7]{ABC}\ \underarc[.8]{ABC}\ \underarc[.9]{ABC}\ \underarc{ABC}$\par \vspace{2ex} \underarc[.1]{ABC}\ \underarc[.2]{ABC}\ \underarc[.3]{ABC}\ \underarc[.4]{ABC}\ \underarc[.5]{ABC}\ \underarc[.6]{ABC}\ \underarc[.7]{ABC}\ \underarc[.8]{ABC}\ \underarc[.9]{ABC}\ \underarc{ABC}\par \vspace{4ex} $\overarc[.1]{ab}\ \overarc[.2]{ab}\ \overarc[.3]{ab}\ \overarc[.4]{ab}\ \overarc[.5]{ab}\ \overarc[.6]{ab}\ \overarc[.7]{ab}\ \overarc[.8]{ab}\ \overarc[.9]{ab}\ \overarc{ab}$\par \vspace{2ex} $\overarc[.1]{abc}\ \overarc[.2]{abc}\ \overarc[.3]{abc}\ \overarc[.4]{abc}\ \overarc[.5]{abc}\ \overarc[.6]{abc}\ \overarc[.7]{abc}\ \overarc[.8]{abc}\ \overarc[.9]{abc}\ \overarc{abc}$\par \vspace{2ex} \overarc[.1]{abc}\ \overarc[.2]{abc}\ \overarc[.3]{abc}\ \overarc[.4]{abc}\ \overarc[.5]{abc}\ \overarc[.6]{abc}\ \overarc[.7]{abc}\ \overarc[.8]{abc}\ \overarc[.9]{abc}\ \overarc{abc}\par \vspace{4ex} $\underarc[.1]{ag}\ \underarc[.2]{ag}\ \underarc[.3]{ag}\ \underarc[.4]{ag}\ \underarc[.5]{ag}\ \underarc[.6]{ag}\ \underarc[.7]{ag}\ \underarc[.8]{ag}\ \underarc[.9]{ag}\ \underarc{ag}$\par \vspace{2ex} $\underarc[.1]{abg}\ \underarc[.2]{abg}\ \underarc[.3]{abg}\ \underarc[.4]{abg}\ \underarc[.5]{abg}\ \underarc[.6]{abg}\ \underarc[.7]{abg}\ \underarc[.8]{abg}\ \underarc[.9]{abg}\ \underarc{abg}$\par \vspace{2ex} \underarc[.1]{abg}\ \underarc[.2]{abg}\ \underarc[.3]{abg}\ \underarc[.4]{abg}\ \underarc[.5]{abg}\ \underarc[.6]{abg}\ \underarc[.7]{abg}\ \underarc[.8]{abg}\ \underarc[.9]{abg}\ \underarc{abg}\par \vspace{4ex} \overarc{a e}\ \underarc{a e}\ \overarc{$x+y$}\ \underarc{$x+y$}\ $a_{\underarc[.6]{\tiny xy}}$\ $a^{\overarc[.6]{\tiny xy}}$ \end{document}