The mass-energy equivalence is described by the famous equation
\[E=mc^2\]
discovered in 1905 by Albert Einstein.
In natural units ($c$ = 1), the formula expresses the identity
\begin{equation}
E=m
\end{equation}

Why there isn't Latex language option on Grepper?

{"tags":[{"tag":"p","content":"Write latex equation"},{"tag":"textarea","content":"Inline math equation $ U = RI $\n\nBlock equation:\n\\[\n\tU = RI\n\\]\nor\n$$\n\tU = RI\n$$\n\nNumeroted block equation\n\\begin{equation}\n\tU = RI\n \\label{eq:OhmLaw}\n\\end{equation}\n\nSubequations (Xa, Xb, ...):\n\\begin{subequations}\n\t\\label{eq:OhmLaws}\n\t\\begin{equation}\n\t\tU = RI\n \t\\label{seq:OhmLaw}\n\t\\end{equation}\n\t\\begin{equation}\n\t\tU = ZI\n \t\\label{seq:OhmLawImpedance}\n\t\\end{equation}\n\\end{equations}","code_language":"whatever"}]}

%Not sponsored just a very good formula generator
https://latex.codecogs.com/eqneditor/editor.php

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git clone https://github.com/latex3/latex2e.git