Subscripts and Superscripts in Latex

The symbols _ and ^ are used to represent subscript and superscript terms.

Example

\documentclass{article}
\begin{document}

% SUPERSCRIPT
\begin{equation}
 I^2 + I^2 + I^2 = 0 \
\end{equation}

% SUBSCRIPT
\begin{equation}
 I_2 + I_3 + I_2 = 0 \
\end{equation}

% SUPER AND SUBSCRIPT BOTH
\begin{equation}
 I_1^2 + I_2^2 + I_3^2 = 0 \
\end{equation}

\end{document}

Output

supAndSub

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