KaTeX Test

这是 KaTeX 测试

KaTeX\KaTeX

LaTeX\LaTeX

∑i=1nai\sum\limits _{i=1} ^{n} a_i

2H2+O2 =点燃 2H2O\mathrm{ 2H_2 + O_2 \space \xlongequal {\textsf {点燃}} \space 2H_2O }