Test LaTeX Equation by MathJax
$$\color{Magenta}{a + \rlap{\overbrace{\phantom{b+c+d}}^m} b+ \underbrace{c+d+e}_n + f}
\tag{eg1}
$$
or
$$
x = {-b \pm \sqrt{b^2-4ac} \over 2a}
\tag{eg2}
$$
Please refer to Eq. $(\color{Magenta}{eg1})$ for colorful equation and Eq. $(eg2)$ for normal equation.
Please Right Click the Equation and choose "Show Math As $\Rightarrow$ TeX Commands" to see the code for above equations.
References:
http://www.mathjax.org
http://bbs.emath.ac.cn/thread-5237-1-1.html
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