运算符

∞ \infty ∞ \infty	≠ \neq = \neq	× \times × \times	÷ \div ÷ \div	∼ \sim ∼ \sim
± \pm ± \pm	∓ \mp ∓ \mp	≤ \leq ≤ \leq	≥ \geq ≥ \geq	≈ \approx ≈ \approx
% \% % %	∗ \ast ∗ \ast	⋅ \cdot ⋅ \cdot	≡ \equiv ≡ \equiv	≅ \cong ≅ \cong
∈ \in ∈ \in	∋ \ni ∋ \ni	∃ \exists ∃ \exists	∄ \nexists ∄ \nexists	∝ \propto ∝ \propto
∪ \cup ∪ \cup	∩ \cap ∩ \cap	⊥ \perp ⊥ \perp	∥ \parallel ∥ \parallel	∘ \circ ∘ \circ
⊆ \subseteq ⊆ \subseteq	⫋ ⫋ ⫋ ⫋	∀ ∀ ∀ ∀	≆ \ncong ≆ \ncong	≁ \nsim ≁ \nsim
= = = =	+ + + +	≪ \ll ≪ \ll	≫ \gg ≫ \gg	⊂ \subset ⊂ \subset
≐ \doteq ≐ \doteq	< < > >	≺ \prec ≺ \prec	≻ \succ ≻ \succ
⪯ \preceq ⪯ \preceq	⪰ \succeq ⪰ \succeq	⊃ \supset ⊃ \supset	≃ \simeq ≃ \simeq	⊇ \supseteq ⊇ \supseteq
⊈ \nsubseteq ⊈ \nsubseteq	⊏ \sqsubset ⊏ \sqsubset	⊐ \sqsupset ⊐ \sqsupset	⋈ \Join ⋈ \Join	∉ \notin ∈/ \notin
∫ \int ∫ \int	∬ \iint ∬ \iint	∭ \iiint ∭ \iiint	∰ \oiiint ∭ ​ \oiiint	∑ \sum ∑ \sum
∏ \prod ∏ \prod	∐ \coprod ∐ \coprod	⋀ \bigwedge ⋀ \bigwedge	⋁ \bigvee ⋁ \bigvee	⋂ \bigcap ⋂ \bigcap
⋃ \bigcup ⋃ \bigcup	⨀ \bigodot ⨀ \bigodot	⨁ \bigoplus ⨁ \bigoplus	⨂ \bigotimes ⨂ \bigotimes	⨄ \biguplus ⨄ \biguplus
\ \backslash \ \backslash	/ / / /	⋇ \divideontimes ⋇ \divideontimes	⋆ \star ⋆ \star	≀ \wr ≀ \wr
△ \vartriangle △ \vartriangle	‡ \ddag ‡ \ddag	⋄ \diamond ⋄ \diamond	† \dag † \dag	∧ \wedge ∧ \wedge
∨ \vee ∨ \vee	⊙ \odot ⊙ \odot	⊗ \otimes ⊗ \otimes	⊕ \oplus ⊕ \oplus	⊖ \ominus ⊖ \ominus
⋓ \Cup ⋓ \Cup	⋒ \Cap ⋒ \Cap	∔ \dotplus ∔ \dotplus	⊺ \intercal ⊺ \intercal	∵ \because ∵ \because
∴ \therefore ∴ \therefore	∽ \backsim ∽ \backsim	⊎ \uplus ⊎ \uplus	∝ \propto ∝ \propto	∯ \oiint ∬ ​ \oiint
∮ \oint ∮ \oint	⨆ \bigsqcup ⨆ \bigsqcup	⊢ \vdash ⊢ \vdash	⊣ \dashv ⊣ \dashv	⋈ \bowtie ⋈ \bowtie
⊑ \sqsubseteq ⊑ \sqsubseteq	⊒ \sqsupseteq ⊒ \sqsupseteq	⊨ \models ⊨ \models	∣ \mid ∣ \mid	∥ \parallel ∥ \parallel
⌣ \smile ⌣ \smile	⌢ \frown ⌢ \frown	≍ \asymp ≍ \asymp	: : : :	± \pm ± \pm
‵ \backprime ‵ \backprime	′ \prime ′ \prime	⌈ ⌉ ⌈⌉ ⌈⌉ ⌈⌉	⌊ ⌋ ⌊⌋ ⌊⌋ ⌊⌋

希腊字母

α \alpha α \alpha	β \beta β \beta	γ \gamma γ \gamma	δ \delta δ \delta	ϕ \phi ϕ \phi
ϵ \epsilon ϵ \epsilon	ζ \zeta ζ \zeta	η \eta η \eta	θ \theta θ \theta	ι \iota ι \iota
κ \kappa κ \kappa	λ \lambda λ \lambda	μ \mu μ \mu	ν \nu ν \nu	ξ \xi ξ \xi
ρ \rho ρ \rho	σ \sigma σ \sigma	τ \tau τ \tau	υ \upsilon υ \upsilon	φ \varphi φ \varphi
χ \chi χ \chi	ω \omega ω \omega	π \pi π \pi	ψ \psi ψ \psi	ε \varepsilon ε \varepsilon
ϑ \vartheta ϑ \vartheta	o o o o	ϖ \varpi ϖ \varpi	ϱ \varrho ϱ \varrho	ς \varsigma ς \varsigma
φ \varphi φ \varphi	Ξ \Xi Ξ \Xi	Γ \Gamma Γ \Gamma	Δ \Delta Δ \Delta	Λ \Lambda Λ \Lambda
Ω \Omega Ω \Omega	Φ \Phi Φ \Phi	Ψ \Psi Ψ \Psi	Π \Pi Π \Pi	Σ \Sigma Σ \Sigma
Θ \Theta Θ \Theta	Υ \Upsilon Υ \Upsilon

字母类符号

ℵ \aleph ℵ \aleph	ℶ \beth ℶ \beth	ℸ \daleth ℸ \daleth	ℷ \gimel ℷ \gimel	∂ \partial ∂ \partial
Ⅎ \Finv Ⅎ \Finv	ℜ \Re ℜ \Re	ℓ \ell ℓ \ell	ð \eth ð \eth	ℑ \Im ℑ \Im
ℏ \hslash ℏ \hslash	∁ \complement ∁ \complement	℘ \wp ℘ \wp	∀ \forall ∀ \forall

括号

( ( ( (	) ) ) )	[ [ [ [	] ] ] ]	{ \{ { \{
} \} } \}	∣ \vert ∣ \vert	∥ \Vert ∥ \Vert	/ / / /

箭头

← \leftarrow ← \leftarrow	→ \to → \to	→ \rightarrow → \rightarrow	↑ \uparrow ↑ \uparrow	↓ \downarrow ↓ \downarrow
⟵ \longleftarrow ⟵ \longleftarrow	⟶ \longrightarrow ⟶ \longrightarrow	⇐ \Leftarrow ⇐ \Leftarrow	⇒ \Rightarrow ⇒ \Rightarrow	↦ \mapsto ↦ \mapsto
↔ \leftrightarrow ↔ \leftrightarrow	↚ \nleftarrow ↚ \nleftarrow	↛ \nrightarrow ↛ \nrightarrow	⇀ \rightharpoonup ⇀ \rightharpoonup	↼ \leftharpoonup ↼ \leftharpoonup
↮ \nleftrightarrow ↮ \nleftrightarrow	⇔ \Leftrightarrow ⇔ \Leftrightarrow	⇎ \nLeftrightarrow ⇎ \nLeftrightarrow	⇍ \nLeftarrow ⇍ \nLeftarrow	⇏ \nRightarrow ⇏ \nRightarrow

几何学

∠ \angle ∠ \angle	∢ \sphericalangle ∢ \sphericalangle	∤ \nmid ∤ \nmid	∦ \nparallel ∦ \nparallel	■ \blacksquare ■ \blacksquare
⋆ \star ⋆ \star	∙ \bullet ∙ \bullet	★ \bigstar ★ \bigstar	□ \square □ \square	∘ \circ ∘ \circ

函数

Pr ⁡ \Pr Pr \Pr	sin ⁡ \sin sin \sin	cos ⁡ \cos cos \cos	exp ⁡ \exp exp \exp	det ⁡ \det det \det
lim ⁡ \lim lim \lim	ln ⁡ \ln ln \ln	log ⁡ \log log \log	max ⁡ \max max \max	min ⁡ \min min \min
tan ⁡ \tan tan \tan	arg ⁡ \arg arg \arg	lg ⁡ \lg lg \lg	arcsin ⁡ \arcsin arcsin \arcsin	cot ⁡ \cot cot \cot
sh ⁡ \sh sh \sh

强调符号

a ˙ \dot{a} a˙ \dot{a}	a ¨ \ddot{a} a¨ \ddot{a}	a ^ \hat{a} a^ \hat{a}	a ~ \tilde{a} a~ \tilde{a}	a ˉ \bar{a} aˉ \bar{a}
a ⃗ \vec{a} a \vec{a}	x y z ‾ \overline{xyz} xyz​ \overline{xyz}	x y z ^ \widehat{xyz} xyz ​ \widehat{xyz}	x y z ~ \widetilde{xyz} xyz ​ \widetilde{xyz}	a ˇ \check{a} aˇ \check{a}
a ˊ \acute{a} aˊ \acute{a}	a ˋ \grave{a} aˋ \grave{a}	a ˘ \breve{a} a˘ \breve{a}

空白符号

a b a\qquad{b} ab a\qquad{b}	a b a\quad{b} ab a\quad{b}	a   b a \ b a b a \ b	a    b a \; b ab a\ ; b	a   b a \, b ab a \, b
a b a b ab a b	a  ⁣ b a \! b ab a \! b

省略符号

⋯ \cdots ⋯ \cdots	… \ldots … \ldots	⋮ \vdots ⋮ \vdots	⋱ \ddots ⋱ \ddots

数值编号

Ⅰ	Ⅱ	Ⅲ	Ⅳ	Ⅴ	Ⅵ	Ⅶ	Ⅷ	Ⅸ	Ⅹ	Ⅺ	Ⅻ
①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
⑴	⑵	⑶	⑷	⑸	⑹	⑺	⑻	⑼	⑽
㈠	㈡	㈢	㈣	㈤	㈥	㈦	㈧	㈨	㈩

分式

基本格式：
\frac{分子}{分母} → 分子 分母 \frac{分子}{分母} 分母分子​

样例：
d y d x \frac{dy}{dx} dxdy​ ← \frac{dy}{dx}

∂ y ∂ x \frac{\partial{y}}{\partial{x}} ∂x∂y​ ← \frac{\partial{y}}{\partial{x}}

上下标

基本格式：
anytext_{downtext}^{uptext} → a n y t e x t d o w n t e x t u p t e x t anytext_{downtext}^{uptext} anytextdowntextuptext​

也可以颠倒过来：anytext^{uptext}\_{downtext}

还可以只加一种：anytext_{downtext} 或 anytext^{uptext}

样例：

x 2 x^{2} x2 ← x^{2}

H 2 O H_{2}O H2​O ← H_{2}O

根式

基本格式：
\sqrt[开根幂次数]{被开根数} → 被开根数 开根幂次数 \sqrt[开根幂次数]{被开根数} 开根幂次数被开根数 ​

样例：

2 \sqrt{2} 2 ​ ← \sqrt{2}

2 3 \sqrt[3]{2} 32 ​ ← \sqrt[3]{2}

3 n \sqrt[n]{3} n3 ​ ← \sqrt[n]{3}

积分

基本格式：
\int_{积分下限}^{积分上限} → ∫ 积分下限 积分上限 \int_{积分下限}^{积分上限} ∫积分下限积分上限​

也可以颠倒过来：\int^{积分上限}_{积分下限}

样例：
\int^{3}_{8}x^3dx → ∫ 8 3 x 3 d x \int^{3}_{8}x^3dx ∫83​x3dx

求积

基本格式：
\prod_{downtext}^{uptext}{text} → ∏ d o w n t e x t u p t e x t t e x t \prod_{downtext}^{uptext}{text} ∏downtextuptext​text

样例：
\prod_{k=1}^{n}f(k) → ∏ k = 1 n f ( k ) \prod_{k=1}^{n}f(k) ∏k=1n​f(k)

要想把上下标放到求和/求积符号上方和下方，则格式为：
\prod\limits_{k=1}^{n}f(k) → ∏ k = 1 n f ( k ) \prod\limits_{k=1}^{n}f(k) k=1∏n​f(k)

求和

\sum\limits_{downtext}^{uptext}{text} → ∑ d o w n t e x t u p t e x t t e x t \sum\limits_{downtext}^{uptext}{text} downtext∑uptext​text

\sum\limits_{i=1}^{n}{f(i)} → ∑ i = 1 n f ( i ) \sum\limits_{i=1}^{n}{f(i)} i=1∑n​f(i)

极限

\lim\limits_{x\to{0}}{\frac{\sin{x}}{x}}=1 → lim ⁡ x → 0 sin ⁡ x x = 1 \lim\limits_{x\to{0}}{\frac{\sin{x}}{x}}=1 x→0lim​xsinx​=1

数列

A=\{a_{1},a_{2},\ldots,a_{n}\} → A = { a 1 , a 2 , … , a n } A=\{a_{1},a_{2},\ldots,a_{n}\} A={a1​,a2​,…,an​}

矩阵

\begin{matrix} 0 & 1 \\ 1 & 0 \end{matrix} → 0 1 1 0 \begin{matrix} 0 & 1 \\ 1 & 0 \end{matrix} 01​10​

\begin{pmatrix} 0 & -i \\ i & 0 \end{pmatrix} → ( 0 − i i 0 ) \begin{pmatrix} 0 & -i \\ i & 0 \end{pmatrix} (0i​−i0​)

\begin{bmatrix} 0 & -1 \\ 1 & 0 \end{bmatrix} → [ 0 − 1 1 0 ] \begin{bmatrix} 0 & -1 \\ 1 & 0 \end{bmatrix} [01​−10​]

\begin{Bmatrix} 1 & 0 \\ 0 & -1 \end{Bmatrix} → { 1 0 0 − 1 } \begin{Bmatrix} 1 & 0 \\ 0 & -1 \end{Bmatrix} {10​0−1​}

\begin{bmatrix} 1 & 1 & \ldots & 1 \\ 2 & 2^{2} & \ldots & 2^{n} \\ 3 & 3^{2} & \ldots & 3^{n} \\ \vdots & \vdots & \ddots & \vdots \\ n & n^{2} & \ldots & n^{n} \end{bmatrix} → [ 1 1 … 1 2 2 2 … 2 n 3 3 2 … 3 n ⋮ ⋮ ⋱ ⋮ n n 2 … n n ] \begin{bmatrix} 1 & 1 & \ldots & 1 \\ 2 & 2^{2} & \ldots & 2^{n} \\ 3 & 3^{2} & \ldots & 3^{n} \\ \vdots & \vdots & \ddots & \vdots \\ n & n^{2} & \ldots & n^{n} \end{bmatrix} ​123⋮n​12232⋮n2​………⋱…​12n3n⋮nn​ ​

行列式

\begin{vmatrix} a & b \\ c & d \end{vmatrix} → ∣ a b c d ∣ \begin{vmatrix} a & b \\ c & d \end{vmatrix} ​ac​bd​ ​

\begin{Vmatrix} i & 0 \\ 0 & -i \end{Vmatrix} → ∥ i 0 0 − i ∥ \begin{Vmatrix} i & 0 \\ 0 & -i \end{Vmatrix} ​i0​0−i​ ​

排列组合

\binom{a}{b}或\tbinom{a}{b} → ( a b ) \binom{a}{b} (ba​)

\dbinom{a}{b} → ( a b ) \dbinom{a}{b} (ba​)

C_{3}^{1} → C 3 1 C_{3}^{1} C31​

A_{3}^{1} → A 3 1 A_{3}^{1} A31​

分段函数

\Psi_{A}(x)=\begin{cases}1, & x\in{A} \\ 0, & x\notin{A} \end{cases} → Ψ A ( x ) = { 1 , x ∈ A 0 , x ∉ A \Psi_{A}(x)=\begin{cases}1, & x\in{A} \\ 0, & x\notin{A} \end{cases} ΨA​(x)={1,0,​x∈Ax∈/A​

化学方程式

C+O_{2}\stackrel{点燃}{\longrightarrow}{CO_{2}} → C + O 2 ⟶ 点燃 C O 2 C+O_{2}\stackrel{点燃}{\longrightarrow}{CO_{2}} C+O2​⟶点燃​CO2​

文本着色

\textcolor{red}{a+b=c} → a + b = c \textcolor{red}{a+b=c} a+b=c

文本加粗

不加粗：A → A A A

加粗：\textbf{A} → A \textbf{A} A