\sin x=1

\color{red} The whole sentence is red in LaTeX

\renewcommand{\sin}{\cos}

\sin x=1

\begin{aligned} x&=1\\ y+y+y+y+y&=\text{cR}\\ \text{crAKWhat}&=IOI \end{aligned}

E \href{javascript:alert("Einstein says so!")}{=} mc^2

\sin x=1

\color{red} The whole sentence is red in LaTeX

\renewcommand{\sin}{\cos}

\sin x=1

\begin{aligned} x&=1\\ y+y+y+y+y&=\text{cR}\\ \text{crAKWhat}&=IOI \end{aligned}

E \href{javascript:alert("Einstein says so!")}{=} mc^2