mathjax test

Instead of using KaTeX I decided to use mathjax on this blog 
because KaTeX was being SPACE-SENSITIVE like who asked for that BS??

$f_{xy}=f_{yx}$

$E=mc^2 +                                   AI$
\(f (x)\)
$e^{i \square}=\cos(\square)+i \sin(\square)$

$$\frac{\partial f}{\partial x} \neq \frac{\partial f}{\partial y}$$

and in calculus 1, we learn that 
$$\forall \epsilon >0 , \exists \delta ~\text{S.T.} ~0<|x-a| <\delta \implies |f(x)-L| < \epsilon $$  

$$a b$$
$$a  b$$
$$a   b$$
\[ non-space sensitive                        gotta use tildes   \]

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