word公式快捷输入

上下标

\(R^2\): R^2
\(R_1\): R_1
\(R_1^2\): R_1^2 或者 R^2_1
\({^2_1}R\): (^2_1)R

分数

\(\frac{a}{2}\): a/2
: a/(b+c) \sdiv(d/e +f)
: (a/(b+c)) \ldiv (d/e+f)

矩阵

\(\cdots\): \cdots
\(\ddots\): \ddots
\(\begin{matrix} a & b\\ c & d \end{matrix}\): \matrix (a&b@c&d) 列元素用&分隔；不同行用@分隔
\(\begin{pmatrix} a & b\\ c & d \end{pmatrix}\): \pmatrix (a&b@c&d)

运算符

\(\neq\):/=
\(\cong\):~=
\(\mp,\pm\): -+, +-
\(\leq,\geq\):<=, >=
: \rect (a+b)
\(\overline{a+b}\): \overbar(a+b)
\(\underline{a+b}\): \underbar(a+b)
\(\overrightarrow{a+b}\): (a+b)\above ->
\(\underset{a+b}{\rightarrow}\): ->\below (a+b)
: (a+b)\ below ->
\(\overset{a+b}{\rightarrow}\): ->\ above (a+b)

根式

\(\sqrt{b^2-4ac}\): \sqrt(b^2 -4ac)空格
\(\sqrt[n]{a+b}\): \sqrt(n&a+b)

大型运算符

\(\sum_{k=0}^{n} xxx\): \sum _(k=0)^n
\(\prod_{k=0}^{n} xxx\): \prod _(k=0)^n

括号

\(\binom{n}{k}\): (n\atop k)
\(f(x)=\left\{\begin{matrix} \sin x & if-\pi\leq x \leq \pi\\ \cos x & otherwise \end{matrix}\right.\): f(x)={\matrix (sin x & “if” -\pi <=x<=\pi @cos x &“otherwise” )空格\close空格空格 (注意：文本内容需要用双引号””括起来，如”if”, “otherwise”)
\(\overbrace {x+\cdots +x}\): \overbrace (x+\cdots +x)
\(\underbrace {x+y+z}\): \underbrace (x+y+z)
\(\overset{k\,times}{\overbrace{x+\cdots +x}}\): \overbrace (x+\cdots +x) \above (“k times” )
同类：
\overparen ⏜ \overshell ⏠ \overbracket ⎴
\(\underset{>0}{\underbrace{x+y+z}}\): \underbrace (x+y+z) \below (>0)
同类：
⏝ ⎵

箭头

\(\rightarrow\):->

导数符号

\(\hat{a}\): \hat
\(\check{a}\): \check
\(\tilde{a}\): \tilde
\(\acute{a}\): \acute
\(\grave{a}\): \grave
\(\dot{a}\): \dot
\(\ddot{a}\): \ddot
: \dddot
: \ddddot
\(\bar{a}\): \bar
\(\vec{a}\): \vec