A summary of $L^AT_EX$ grammer.

Firstly, in Masrkdown, adding an inline $L^AT_EX$ block like $\Gamma(n) = (n-1)!\quad\forall n\in\mathbb N$

And this is a block version.

$$x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$