测试Katex插件 (234567789523)\begin{pmatrix}2&3&4\\5&6&7\\7&8&9\\5&2&3\end{pmatrix}⎝⎜⎜⎛257536824793⎠⎟⎟⎞ x=−b±b2−4ac2ax=\frac{-b\pm\sqrt{b^2-4ac}}{2a}x=2a−b±b2−4ac N=dk−110k−1+...+d1101+d0(0≤di≤9,i=0,...,k−1,dk−1>0)N=d_{k-1}10^{k-1}+...+d_110^1+d_0(0≤d_i≤9,i=0,...,k-1,d_{k-1}>0)N=dk−110k−1+...+d1101+d0(0≤di≤9,i=0,...,k−1,dk−1>0) STL=[GoodEventsValidEvents]∗100%STL = \begin{bmatrix}\frac{Good Events}{Valid Events}\end{bmatrix}*100\%STL=[ValidEventsGoodEvents]∗100%
