Inline codes

`std::cout()`

Code blocks

```c++
int main() {
  return 0;
}
```

Inline formulas

$E=mc^2$

Formula blocks

$$E=mc^2$$

Links

[Text](https://...)

Highlight

==Text==

Images

![Description](https://...)

Images With Size

![Description](url =100x100)

Footnote

Here is a ref[^1].

[^1]: And the footnote.

Videos

@[video](https://.../a.mp4)

Mention

@[](/user/uid)

Learn More

• CommonMark Syntax
• LaTeX Expressions