Examples of Extensions to TeX
Hypertext references:
\href{link}{mathematics}
\lim_{x\to0} {\sin x\over x} \href{extensions-a.html}{=} 1
Colored text:
\color{color}{mathematics}
\color{red}{R} + \color{green}{G} + \color{blue}{B} \qquad
\color{#FFAA33}{\sqrt{x^2+1}}
Bounding boxes:
\bbox[color,extra-space]{mathematics}
\bbox[border:CSS-border-specification]{mathematics}
\bbox[yellow,2pt]{\bbox[#AA80FF,2pt]{x+1}\over 1-x^2} + \int_0^1 \bbox[border:2px green
dotted,2pt]{x^2+2x\,\strut}\,dx
Applying CSS styles:
\style{CSS-styles}{mathematics}
1 \over \style{background-color: #FFEEAA; padding: 0 2 0 4}{x^2} + 1
Applying CSS classes:
\class{CSS-class-name}{mathematics}
\sqrt{1-y\over \lower2pt{\class{framed}{\,x^2 + 1\,}}}
Access to any unicode character:
\unicode{code-point}, e.g. \unicode{x211A}
n\in\unicode{x2124}\qquad
a \mathrel{\unicode{x22B1}} b \qquad
{\unicode{x0919} + 1\over 1 - \unicode{x092D}^2}