deletions | additions       diff --git a/introduction.tex b/introduction.tex  index da7b898..1eb334c 100644  --- a/introduction.tex  +++ b/introduction.tex 
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Here is some sample LaTeX notation. By associativity, if $\zeta$ is combinatorially closed then $\delta = \Psi$. Since $${S^{(F)}} \left( 2, \dots,-\mathbf{{i}} \right) \to \frac{-\infty^{-6}}{\overline{\alpha}},$$ $l < \cos \left( \hat{\xi} \cup P \right)$. Thus every functor is Green and hyper-unconditionally stable. Obviously, every injective homeomorphism is embedded and\section{的}\subsection{hh}\subsubsection{cc} Clifford. Because $\mathcal{{A}} > S$, $\tilde{i}$ is not dominated by $b$. Thus ${T_{t}} > | A |$. \subsection{Subsection Heading Here}  Subsection text here. Let's show some\\