标签：color dfrac texttt test Test mathcal

第一次用博客园，测试一下。

test

test

test

test

test

test	test
test	test
test	test

\(\mathcal{test}\)

\(\mathcal{O}(n\log n)\)

\(\texttt{test}\)

\[\Huge{\texttt{test}} \]

\(\color{Red}{test}\)

\(x=\dfrac{-b\pm\sqrt{\color{Red}b^2-4ac}}{\color{Blue}2a}\)

\[\boxed{\sum\limits_{i = 1}^{n} i = \dfrac{n(n - 1)}{2}} \]

标签：color,dfrac,texttt,test,Test,mathcal
From： https://www.cnblogs.com/zhang-kevin/p/17237630.html