答案1
我只用了我的旧答案如何将图像添加为上标...但在用户@daleif 的评论下标中。显然,如果您想放大或缩小图像,请更改比例参数数字。
\documentclass[a4paper,12pt]{article}
\usepackage{amsmath}
\usepackage{graphicx}
\begin{document}
$L\textsubscript{\includegraphics[scale=0.04]{example-image-a}}+L\textsubscript{\includegraphics[scale=0.04]{example-image-b}}=z(L\textsubscript{\includegraphics[scale=0.04]{example-image-c}}+L\textsubscript{\includegraphics[scale=0.04]{example-image-b}})$.\\
\end{document}