Markdown进阶语法

# Sub & Sup 上下标

H~2~O

x^2^ + y^2^ + 2xy = (x + y)^2^

H₂O

x² + y² + 2xy = (x + y)²

# FootNote 脚注

Java[^1]

[^1]: Java 是一门静态类型面向对象的语言。

Java^[1]

# Highlight 高亮

==黄底黑字==

黄底黑字

# Anchor 锚

[FootNote 脚注](#footnote-脚注)

FootNote 脚注

# Table of content 目录

[toc]

[[toc]]

[[_TOC_]]

[toc]

[[TOC]]

# Define 定义

First Term : This is the definition of the first term.

Second Term : This is one definition of the second term. : This is another definition of the second term.

# Mermaid

# Flowchart 流程图

# Sequence diagram 序列图

# Class diagram 类图

# State diagram 状态图

# ER 图

# User journey Diagram 用户体验图

# Gantt 甘特图

# Pie chart 饼图

# Requirement diagram 需求图

# Git 图

# Tex

$2^3$

$$2^3$$

$$
\begin{aligned}
\text{第一行：} & 1\\
\text{第二行：} & 2E
\end{aligned}
$$

$2^3$

$$2^3$$

$$\begin{array}{rl}\text{第一行：}& 1\\ \text{第二行：}& 2E\end{array}$$

$$
\frac {\partial^r} {\partial \omega^r} \left(\frac {y^{\omega}} {\omega}\right)
= \left(\frac {y^{\omega}} {\omega}\right) \left\{(\log y)^r + \sum_{i=1}^r \frac {(-1)^i r \cdots (r-i+1) (\log y)^{r-i}} {\omega^i} \right\}
$$

$$\frac{{\partial }^r}{\partial {\omega }^r}\left(\frac{y^{\omega }}{\omega }\right)=\left(\frac{y^{\omega }}{\omega }\right)\left\{(\log y{)}^r+\sum _{i=1}^r\frac{(-1{)}^{i}r\cdots (r-i+1)(\log y{)}^{r-i}}{{\omega }^i}\right\}$$

# 对齐

$$
\begin{aligned}
x ={}& a+b+c+{} \\
&d+e+f+g
\end{aligned}
$$

$$
\begin{alignedat}{2}
   10&x+ &3&y = 2 \\
   3&x+&13&y = 4
\end{alignedat}
$$

$$\begin{array}{rl}x=& a+b+c+\\ & d+e+f+g\end{array}$$

$$\begin{array}{rlrl}10& x+& 3& y=2\\ 3& x+& 13& y=4\end{array}$$

# 分段函数

$$
y= \begin{cases}
-x,\quad x\leq 0 \\
x,\quad x>0
\end{cases}
$$

$$y=\{\begin{array}{l}-x,x\le 0\\ x,x>0\end{array}$$

# 编号

$\tag{1} x+y^{2x}$

$\tag*{1} x+y^{2x}$

$$x+y^{2x}\text{\hspace{1em}(1)}$$

$$x+y^{2x}\text{\hspace{1em}1}$$