\documentclass{article}

\documentclass{article}
\usepackage{amsmath} % pkg required by EasyLatex
\usepackage{amsfonts} % pkg required by EasyLatex
\usepackage{amssymb} % pkg required by EasyLatex
\usepackage{psfrag} % pkg required by EasyLatex
\usepackage[dvips]{graphicx} % pkg required by EasyLatex

\begin{document}

Dots to ldots changes $\ldots$ to ldots

$1 + 2$ + $\ldots$ + 10

$v_1 v_2\ldots v_n$

\end{document}