[Tex/LaTex] LaTeX – Copy and paste º

Question

I have a LaTeX document.

I can copy from PDF (º), but it pastes as (o). How can I handle it?

Use:

\documentclass[12pt,a4paper]{report}
\usepackage[utf8]{inputenc}
\usepackage[brazil]{babel}
\usepackage{lmodern, cmap}
\usepackage[T1]{fontenc}
\usepackage[normalem]{ulem}
\usepackage{hyperref}
\usepackage{amssymb}

Answer 1

You don't need to copy and paste to get such simple symbols. I'm not sure what that circle is, but I guess it should be either the functional composition operator,the temperature degree symbol, or the masculine ordinal indicator.

\documentclass{article}
\usepackage{siunitx}
\usepackage{amsmath}

\begin{document}

    \begin{equation*}
    \begin{split}
    f \circ g\\
    \quad \SI{7}{\celsius}\\
    \quad \psi\textsuperscript{\b{x}}
    \end{split}
    \end{equation*}

\end{document}