This is part 1.

Let’s try some math. As the source is a Markdown and not an RMarkdown file, one has to use special syntax to enable math rendering. Specifically, one can use

1. \\( <LaTeX> \\) and \\[ <LaTeX> \\],
2. `$<LaTeX>$` and `$$<LaTeX>$$`,

for inline and display mode, respectively. In the former, one can use \newline or \\\\\ instead of \\ to break lines.

Let \(x = 1\) and

\[ \begin{align} z^2 &= x^2 + y^2 \\
x &= 3 \newline y &= 4. \end{align} \]

Alternatively, let $x = 1$ and

$$ \begin{align} z^2 &= x^2 + y^2 \\ x &= 3 \\ y &= 4. \end{align} $$