Help:Subscripts, superscripts, integrals

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Feature	Syntax	How it looks rendered
Feature	Syntax	HTML	PNG
Superscript	`a^2`	$a 2$	$a^2 \,\!$
Subscript	`a_2`	$a 2$	$a_2 \,\!$
Grouping	`a^{2+2}`	$a 2 + 2$	$a^{2+2}\,\!$
Grouping	`a_{i,j}`	$a i, j$	$a_{i,j}\,\!$
Combining sub & super	`x_2^3`	$x_2^3$
Super super	`10^{10^{ \,\!{8} }`	$10^{10^{ \,\! 8 } }$
Super super	`10^{10^{ \overset{8}{} }}`	$10^{10^{ \overset{8}{} }}$
Super super (wrong in HTML in some browsers)	`10^{10^8}`	$10^{10^8}$
Preceding and/or Additional sub & super	`\sideset{_1^2}{_3^4}\prod_a^b`	$\sideset{_1^2}{_3^4}\prod_a^b$
Preceding and/or Additional sub & super	`{}_1^2\!\Omega_3^4`	${}_1^2\!\Omega_3^4$
Stacking	`\overset{\alpha}{\omega}`	$\overset{\alpha}{\omega}$
	`\underset{\alpha}{\omega}`	$\underset{\alpha}{\omega}$
	`\overset{\alpha}{\underset{\gamma}{\omega}}`	$\overset{\alpha}{\underset{\gamma}{\omega}}$
	`\stackrel{\alpha}{\omega}`	$\stackrel{\alpha}{\omega}$
Derivative (forced PNG)	`x', y'', f', f''\!`		$x', y'', f', f''\!$
Derivative (f in italics may overlap primes in HTML)	`x', y'', f', f''`	$x', y'', f', f''$	$x', y'', f', f''\!$
Derivative (wrong in HTML)	`x^\prime, y^{\prime\prime}`	$x^\prime, y^{\prime\prime}$	$x^\prime, y^{\prime\prime}\,\!$
Derivative (wrong in PNG)	`x\prime, y\prime\prime`	$x\prime, y\prime\prime$	$x\prime, y\prime\prime\,\!$
Derivative dots	`\dot{x}, \ddot{x}`	$\dot{x}, \ddot{x}$
Underlines, overlines, vectors	`\hat a \ \bar b \ \vec c`	$\hat a \ \bar b \ \vec c$
	`\overrightarrow{a b} \ \overleftarrow{c d} \ \widehat{d e f}`	$\overrightarrow{a b} \ \overleftarrow{c d} \ \widehat{d e f}$
	`\overline{g h i} \ \underline{j k l}`	$\overline{g h i} \ \underline{j k l}$
Arrows	`A \xleftarrow{n+\mu-1} B \xrightarrow[T]{n\pm i-1} C`	$A \xleftarrow{n+\mu-1} B \xrightarrow[T]{n\pm i-1} C$
Overbraces	`\overbrace{ 1+2+\cdots+100 }^{5050}`	$\overbrace{ 1+2+\cdots+100 }^{5050}$
Underbraces	`\underbrace{ a+b+\cdots+z }_{26}`	$\underbrace{ a+b+\cdots+z }_{26}$
Sum	`\sum_{k=1}^N k^2`	$\sum_{k=1}^N k^2$
Sum (force `\textstyle`)	`\textstyle \sum_{k=1}^N k^2`	$\textstyle \sum_{k=1}^N k^2$
Product	`\prod_{i=1}^N x_i`	$\prod_{i=1}^N x_i$
Product (force `\textstyle`)	`\textstyle \prod_{i=1}^N x_i`	$\textstyle \prod_{i=1}^N x_i$
Coproduct	`\coprod_{i=1}^N x_i`	$\coprod_{i=1}^N x_i$
Coproduct (force `\textstyle`)	`\textstyle \coprod_{i=1}^N x_i`	$\textstyle \coprod_{i=1}^N x_i$
Limit	`\lim_{n \to \infty}x_n`	$\lim_{n \to \infty}x_n$
Limit (force `\textstyle`)	`\textstyle \lim_{n \to \infty}x_n`	$\textstyle \lim_{n \to \infty}x_n$
Integral	`\int\limits_{1}^{3}\frac{e^3/x}{x^2}\, dx`	$\int\limits_{1}^{3}\frac{e^3/x}{x^2}\, dx$
Integral (force `\textstyle`)	`\textstyle \int\limits_{-N}^{N} e^x\, dx`	$\textstyle \int\limits_{-N}^{N} e^x\, dx$
Double integral	`\iint\limits_{D} \, dx\,dy`	$\iint\limits_{D} \, dx\,dy$
Triple integral	`\iiint\limits_{E} \, dx\,dy\,dz`	$\iiint\limits_{E} \, dx\,dy\,dz$
Quadruple integral	`\iiiint\limits_{F} \, dx\,dy\,dz\,dt`	$\iiiint\limits_{F} \, dx\,dy\,dz\,dt$
Path integral	`\oint\limits_{C} x^3\, dx + 4y^2\, dy`	$\oint\limits_{C} x^3\, dx + 4y^2\, dy$
Intersections	`\bigcap_1^{n} p`	$\bigcap_1^{n} p$
Unions	`\bigcup_1^{k} p`	$\bigcup_1^{k} p$