# H1
## H2
### H3
*italic*
_italic_
**bold**
__bold__
~~strikethrough~~
- Item 1
- Item 2
1. Ordered 1
2. Ordered 2
[text](url)
`inline code`
```language
code block
```
$inline math$
$$block math$$
$\sqrt{a^2 + b^2}$
$$\int_a^b f(x)dx$$
| Header | Header |
|--------|--------|
| Cell | Cell |