User:JuguangXiao/sandbox

$$\alpha$$ $&alpha;$   or   $&alpha;$

$$f(x) = x^2$$ $f(x) = x^{2}$

$$\{1,e,\pi\}$$ $\{1, e, &pi;\}$

$$|z + 1| \leq 2$$ $|z + 1| &le; 2$

2024-03-31 : my IPBE is granted.