公式测试

LATEX

${\cfrac{1}{\sqrt 2 + \cfrac{1}{\sqrt 2 +\dotsb}}} \quad \cfrac{1}{\sqrt 2 +\cfrac{1} {\sqrt 2 +\dotsb}}$

$\begin{equation} \boxed{\eta \leq C \text{ and } C \leq \Delta} \end{equation}$

$x \in \mathbb{R}$ and $c \in \mathbb{C}$

$\underbrace{a + \overbrace{b+\cdots}^{{}=t}+z} _{\text{total}} ~~ a + {\overbrace{b+\cdots}}^{126}+z$

$\int\limits_0^R \frac{2x,dx}{1+x^2}$

$\int_{a_1}^{b_1}f(x)dx+\int_{a_2}^{b_2}g(x)dx+\int_{a_3}^{b_3}h(x)dx=0$