Formulas and letters in Markdown indicate summary

I have typed a lot of Markdown formulas in the past few months, and I will forget some of the expressions after a while. It is better to summarize the records here slowly and check them when you want to use them in the future!

1. Commonly used Greek alphabet

capital	lower case	Chinese name	English	Capital Markdown	Lowercase Markdown
$\mathrm{A}$	$a$	alpha	Alpha	\Alpha	\alpha
$\mathrm{B}$	$b$	Beta	Beta	\Beta	\beta
$\Gamma$	$c$	Gamma	Gamma	\Gamma	\gamma
$\Delta$	$d$	Delta	Delta	\Delta	\delta
$\mathrm{E}$	$ϵ$	Ipsilon	Epsilon	\Epsilon	\epsilon
$WITH$	$g$	Zeta	Zeta	\Zeta	\zeta
$\Theta$	$\theta$	Sita	theta	\Theta	\theta
$\Lambda$	$\lambda$	Lambda	Lambda	\Lambda	\lambda
$X$	$X$	Cauchy	xi	\Xi	\xi
$\Omega$	$\omega$	Omega	Omega	\Omega	\omega
$\Psi$	$\psi$	Pusay	Psi	\Psi	\psi
$\mathrm{X}$	$\chi$	Kai	Chi	\ Chi	\ chi
$Phi$	$\varphi$	Fai	Phi	\Phi	\phi
$\mathrm{P}$	$\rho$	meat	Rho	\Rho	\rho

2. Mathematical formula