Circles

Aligned and centered equation test:
[katex, display=true]
\begin{aligned}
C = 2 \pi & r \\
A & = C
\end{aligned}
[/katex]

Non centered equation test:
[katex]
\begin{aligned}
C = 2 \pi & r \\
A & = C
\end{aligned}
[/katex]

Inline math test: [katex] A = E\cdot \sum_{n=1}^\infty x^n [/katex].

x	y
5	8
3	2