# How to draw two arrows, one in the numerator and another one in the denominator in equations?

\documentclass{article}
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{amsfonts}

\begin{document}
$$H(\&)= \dfrac{R_1 + R_2(\&C_2R_1 +1)}{\&C_2R_1 +1}$$
\end{document}


I would like to achieve the following output:

You can use a simple array environment, based on this answer:

\documentclass{article}
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{amsfonts}

\begin{document}

$$H(\&)= \dfrac{R_1 + R_2(\&C_2R_1 +1)}{\&C_2R_1 +1}\begin{array}{l} \rightarrow \text{Ceros}\\ \rightarrow \text{Polos} \end{array}$$
\end{document}


Related: Case equation without curly brace.