OriginalLaTex测试$$ z = \frac{x}{y} $$$$ C_1 \quad= \quad c_2 + c_4^3 $$$$ y = \sqrt {x_1^2 + x_2^2 + x_3^2 + x_4^2} $$$$ y = \sqrt [3]{x_1^2 + x_2^2 + x_3^2 + x_4^2} $$$$ \overrightarrow{AB} = \overrightarrow{b} + \overrightarrow{a} $$$$ c = a \cdot c $$$$ \lim_{x\rightarrow0} \sin(x+y) $$$$ \lim_{x\rightarrow0} \frac{\sin(x)}{x} = 1 $$$$ x^{\frac{1}{2}} $$$$ \int_{0}^{\frac{\pi}{2}} $$$$ \sum_{i=1}^{n} $$$$ \prod_\epsilon $$$$ a, b, c \neq \{ \{ a\}, b, c\} %{ 和 } 是保留字需要‘\’转义 $$$$ 1 + (\frac{1}{1-x^2})^3 $$$$ 1 + \left(\frac{1}{1-x^2}\right)^3 $$$$ \left(\left(x+y\right)\left(x-y\right)\right)^2 $$$$ \big((x+y)(x-y)\big)^2 $$$$ \big((x+y)(x-y)\big)^2 $$$$ \big( \quad \big) \Big( \quad \Big) \bigg( \quad \bigg) \Bigg( \quad \Bigg) $$$$ \left[ \begin{matrix} 1 & 2 & 3 \\\ 4 & 5 & 6 \\\ 7 & 8 & 9 \end{matrix} \right] $$$$ \begin{bmatrix} 1&2&3\\\ 4&5&6\\\ 7&8&9 \end{bmatrix} $$$$ \cdots $$$$ \ddots $$$$ \vdots $$$$ \begin{bmatrix} 1&2&\cdots&4\\\ 7&6&\cdots&5\\\ \vdots&\vdots&\ddots&\vdots\\\ 8&9&\cdots&0 \end{bmatrix} $$