emanote

fn foo(bar: &u32) -> Result<(), ()> {
    Ok(())
}

main = do
    putStr "Yo"

When $a \ne 0$, there are two solutions to $ax^2 + bx + c = 0$ and they are $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$

There is a tutorial on mathjax syntax here.

%%{init: {'theme': 'forest', "flowchart" : { "curve" : "basis" } } }%%
graph TD;
    A-->B;
    A-->C;
    B-->D;
    C-->D;

stateDiagram
    direction LR
    [*] --> A
    A --> B
    B --> C
    state B {
      direction LR
      a --> b
    }
    B --> D