About Math Formula

use tag: start <math>, and the end close it </math>. Like: $E=mc^{2}$

$\alpha$

Superscript $a^{x}$

Subscript $b_{1}$

Grouping $a^{x+y},i_{1...n}$

Combining sub & super without and with horizontal separation $a_{2}^{3}$ or ${a_{2}}^{3}$

Super super $a^{b^{x}}$

Sum $\sum _{k=1}^{N}k^{2}$

Sum (force \textstyle) $\textstyle \sum _{k=1}^{N}k^{2}$

Product $\prod _{i=1}^{N}x_{i}$

Product (force \textstyle) $\textstyle \prod _{i=1}^{N}x_{i}$

Limit $\lim _{n\to \infty }x_{n}$

Limit (force \textstyle) $\textstyle \lim _{n\to \infty }x_{n}$

Fractions ${\frac {a}{b}}=c$ or use 'over' ${a \over b}=c$

Small fractions ${\tfrac {x}{y}}=z$

Matrices ${\begin{matrix}x&y\\z&v\end{matrix}}$

or ${\begin{vmatrix}x&y\\z&v\end{vmatrix}}$ or ${\begin{pmatrix}x&y\\z&v\end{pmatrix}}$ or ${\begin{bmatrix}x&y\\z&v\end{bmatrix}}$ or ${\begin{Bmatrix}x&y\\z&v\end{Bmatrix}}$ or ${\begin{bmatrix}0&\cdots &0\\\vdots &\ddots &\vdots \\0&\cdots &0\end{bmatrix}}$