Letex 学习： Subscripts and Superscripts

程序：

\documentclass{article}\usepackage{amsmath}\usepackage{amssymb}\usepackage{graphicx}\begin{document}\title{Math: subscripts and superscripts}\author{he}\maketitle%put math in dollar signs: $x^2$ or $y_k$% $x^{123}$ for superscript% $y_^2$ or $y_[123] subscrikpt%mix and match: $y^{123}_[abc]$Here is some math $x^2$ and $y_k$.This is some more advanced subscripts andsuperscripts $x^{124}$ and $y_{ijk}$.Mix and mach: $x^2_i$ or $z^{123}_{abc}$.\end{document}

运行如下：