# English engineering note

Before $x_1^2+x_2^2=r^2$ AFTER_INLINE. Currency costs $10 and $20, not a formula.

Literal escaped dollar: \$50. Inline code: `price = "$10"; equation = "$x$";`.

```js
const price = "$20";
  const formula = "$x+y$";
  const gap = "a  b";
```

## Fractions and tables

$$
\frac{a+b}{c+d}=\sqrt{x^2+y^2}
$$

AFTER_DISPLAY.

| Item | Equation | Comment |
| --- | --- | --- |
| CELL_A | $\frac{1}{1+\frac{1}{x}}$ | Wrapped fraction stays inside its row. |
| CELL_B | $\alpha+\beta=\gamma$ | NEXT_ROW intact. |

1. First expression $v=d/t$ LIST_END.
2. Second item has **bold**, *italic*, and [the project](https://pdfmdtools.com/).

```mermaid
flowchart LR
  A[Receive report] --> B{Totals valid?}
  B -->|Yes| C[Export PDF]
  B -->|No| D[Revise report]
```

GRAPH_END.

## Finish

FINAL_MARKER. [Documentation](https://example.com/docs) and [support](mailto:support@example.com).