Test post

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Hello world, this is my first post for blog testing.

quote cotent

Photo credit: Tourism Bureau

$LaTeX\, Math\, expression\, \epsilon_0$

$\sin ^{ 2 }{ \theta +\cos ^{ 2 }{ \theta =1 } }$

$$f(x) = \int_{0}^{\pi} sin(x) dx$$ $$\begin{bmatrix} 1 & 2 & 3 \\ 4 & 5 & 6 \\ 7 & 8 & 9 \end{bmatrix}+ \begin{bmatrix} 10 & 11 & 12 \\ 13 & 14 & 15 \\ 16 & 17 & 18 \end{bmatrix}= \begin{bmatrix} 11 & 13 & 15 \\ 17 & 19 & 21 \\ 23 & 25 & 27 \end{bmatrix}$$

$\pi$

$$\begin{equation} \label{eq1} e=mc^2 \end{equation}$$

The famous matter-energy equation $\eqref{eq1}$ proposed by Einstein…

$$\begin{equation} \label{eq2} \begin{aligned} a &= b + c \\ &= d + e + f + g \\ &= h + i \end{aligned} \end{equation}$$

Equation $\eqref{eq2}$ is a multi-line equation.

$$\begin{align} a &= b + c \label{eq3} \\ x &= yz \label{eq4}\\ l &= m - n \label{eq5} \end{align}$$

There are three aligned equations: equation $\eqref{eq3}$, equation $\eqref{eq4}$ and equation $\eqref{eq5}$.

$$\begin{align} -4 + 5x &= 2+y \nonumber \\ w+2 &= -1+w \\ ab &= cb \end{align}$$ $$x+1\over\sqrt{1-x^2} \tag{i}\label{eq_tag}$$

Equation $\eqref{eq_tag}$ use \tag{} instead of automatic numbering.

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a	s	c
dd	ddddddd	aa
ddd	233	rrrr

1. 123
2. 2
3. sss

References

• Hexo documentation

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