|$\KaTeX$ |Plain Text| | ------- | ------- | |$x_n$ | x_n| |$\stackrel{!}{=}$ | \stackrel{!}{=}| |$\overset{!}{=}$ | \overset{!}{=}| |$\underset{!}{=}$ | \underset{!}{=}| |${=}\mathllap{/\,}$ | {=}\mathllap{/\,}| |$\mathrlap{\,/}{=}$ | \mathrlap{\,/}{=}| |$a \atop b$ | a \atop b| |$a\raisebox{0.25em}{b}c$ | a\raisebox{0.25em}{b}c| |$_u^o$ | _u^o| |$e^x$ | e^x| |$\left(x^{\smash{2}}\right)$ | \left(x^{\smash{2}}\right)| |$\sqrt{\smash[b]{y}}$ | \sqrt{\smash[b]{y}}| |$\sum_{\mathclap{1\le i\le j\le n}} x_{ij}$ | \sum_{\mathclap{1\le i\le j\le n}} x_{ij}|