\[点不等于：\quad (c + d)\cdot2 \neq 1 \tag{01}
\]
\[恒等于取模：\quad 1\equiv1 \quad 5\bmod 2 \equiv 1 \tag{02}
\]
\[公式：\quad f(x) = x + 1 \tag{03}
\]
\[上下标：\quad g^2(x) = x_1^2 + 2 \tag{04}
\]
\[根号分式：\quad \sqrt{2} + \sqrt{x^{\frac{x}{2}}-\sqrt{y}^3} = x^{\frac{2}{y}} \tag{05}
\]
\[上大括号：\quad \overbrace{1 + 2 + \cdots + n}^{n个} \\
下大括号：\quad \underbrace{1 + 2 + \cdots + n}_{n个} \tag{06}
\]
\[上水平线：\quad \overline{x + y} \\
下水平线：\quad \underline{x + y} \tag{07}
\]
\[向量:\quad \vec{a} + \vec{b} = \vec{c} \tag{08}
\]
\[向左箭头：\quad \overleftarrow{AB} \\
向右箭头：\quad \overrightarrow{CD} \tag{09}
\]
\[无穷大：\quad \infty \\
积分：\quad \int_{-\infty}^{+\infty}\frac{1}{2}{x^2}\mathrm{d}x \\
极限：\quad \lim_{x \to \infty} x^2_{0} + 2*x_1^3 \tag{10}
\]
\[求和：\quad \sum_{n=1}^{\infty} \frac{1}{n} \\
乘积：\quad \prod_{j = 1}^{10} 2x_j + \frac{1}{x_j} \tag{11}
\]
\[9*9乘法表：\\
1*1 = 1 \\
1*2=2 & 2*2=4 \\
1*3=3 & 2*3=6 & 3*3=9\\
1*4=3 & 2*4=6 & 3*4=9 & 4*4=16\\
1*5=5 & 2*5=10 & 3*5=15 & 4*5=20 & 5*5=25\\
1*6=6 & 2*6=6 & 3*6=18 & 4*6=24 & 5*6=30 & 6*6=36\\
1*7=7 & 2*7=14 & 3*7=21 & 4*7=28 & 5*7=35 & 6*7=42 & 7*7=49\\
1*8=8 & 2*8=16 & 3*8=24 & 4*8=32 & 5*8=40 & 6*8=48 & 7*8=56 & 8*8=64\\
1*9=9 & 2*9=18 & 3*9=27 & 4*9=36 & 5*9=45 & 6*9=54 & 7*9=63 & 8*9=72 & 9*9=81 \tag{12}\\
换行：\quad \\
分割：\quad &
\]
\[圆点：\quad 1,2,3\cdots \\
省略号：\quad x\cdot2 = 2x \\
垂直点：\quad 1\\ \vdots \\ n\\
对角线点：\quad 1 \ddots 5 \tag{13}
\]
\[重音符号 \hat{x} \quad \bar{x} \quad \tilde{x} \quad \dot{x} \quad \ddot{x} \quad \dddot{x} \quad \ddddot{x} \tag{14}
\]
\[裸矩阵:
\begin{matrix}
a & b \\
c & d
\end{matrix} \tag{15} \\
中括号矩阵：
\begin{bmatrix}
a & b \\
c & d
\end{bmatrix} \\
竖直矩阵：
\begin{vmatrix}
a & b \\
c & d
\end{vmatrix} \\
小括号矩阵：
\begin{pmatrix}
a & b \\
c & d
\end{pmatrix} \\
\]
\[偏导：\quad \frac{\partial y}{\partial x} \tag{16}
\]
\[公式组： D(x)=\begin{cases}
\lim\limits_{x \to 0} \frac{1}{x}, & x<3 \\
\pi, & x=3 \\
\int_0^{\infty} \frac{e}{x^2+1} \mathrm{d}x, &x>3 \tag{17}
\end{cases}
\]
\[希腊小写字母\\
\begin{vmatrix}
\alpha & \beta & \gamma & \delta & \epsilon & \zeta \\
\eta & \theta & \iota & \kappa & \lambda & \mu \\
\nu & \xi & \omicron & \pi & \rho & \sigma \\
\tau & \upsilon & \phi & \chi & \psi & \omega \\
\varepsilon & \vartheta & \varsigma & \varphi & \varrho & \varpi &
\end{vmatrix} \tag{18}
\]
\[希腊大写字母\\
\begin{vmatrix}
\Alpha & \Beta & \Gamma & \Delta & \Epsilon & \Zeta \\
\Eta & \Theta & \Iota & \Kappa & \Lambda & \Mu \\
\Nu & \Xi & \Omicron & \Pi & \Rho & \Sigma \\
\Tau & \Upsilon & \Phi & \Chi & \Psi & \Omega \\
\varDelta & \varLambda & \varXi & \varPi & \varSigma & \varUpsilon \\
\varPhi & \varPsi & \varOmega
\end{vmatrix}
\]