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这里使用了插件

使用 $ 符号

$a^2 + b^2 = c^2$

$a^2 + b^2 = c^2$

或 \(, \) 转义

\(1+2+\dots+n=\frac{n(n+1)}{2}\)

\(1+2+\dots+n=\frac{n(n+1)}{2}\)  

使用 $$ 符号, 在单独的行显示数学公式

$$ \frac{d}{dx}\left( \int_{0}^{x} f(u)\,du\right)=f(x) $$

$$ \frac{d}{dx}\left( \int_{0}^{x} f(u)\,du\right)=f(x) $$

或使用 \[ , \] 转义

\[ \sin A \cos B = \frac{1}{2}\left[ \sin(A-B)+\sin(A+B) \right] \]

\[ \sin A \cos B = \frac{1}{2}\left[ \sin(A-B)+\sin(A+B) \right] \]

A wide range of math environments¹⁾ will work as well:

\begin{align*} e^x & = 1 + x + \frac{x^2}{2} + \frac{x^3}{6} + \cdots \\ & = \sum_{n\geq 0} \frac{x^n}{n!} \end{align*}

\begin{align*}
e^x & = 1 + x + \frac{x^2}{2} + \frac{x^3}{6} + \cdots \\
    & = \sum_{n\geq 0} \frac{x^n}{n!}
\end{align*}

Note that the math environments should not be inside the dollar sign delimiters; the environments should stand on their own with just the \begin and \end statements in order to be parsed correctly.