User:KeithTyler/TeX markup tests

test zone

$\left|\begin{array}{ccc}5& 4& \frac{v+4}{12}\\ a& b& 0\end{array}\right|\times \left|\begin{array}{c}8\\ 8\\ 8\end{array}\right|\ddots \underset{\mathbb{\mathbb{N}}}{\overset{1}{\int }}\mathrm{\infty }$

$\left|\begin{array}{cc}2& 4\\ 8\\ & k\end{array}\right|$

$\left[\begin{array}{cc}2& 4\\ 8& \left[\begin{array}{cc}a& b\\ c& d\end{array}\right]\end{array}\right]$

$\begin{array}{c}\text{If the coefficient of }\frac{y}{\hat{q}}\\ \text{ is equivalent to the ratio of }\\ \sum _{x=-\mathrm{\infty }}^{\mathrm{\infty }}\frac{k}{\underset{y\to 0}{\lim }\hat{q}\times x},\\ \text{we find that: }\\ \hat{q}\approx \frac{k}{y}\end{array}$

$\sum _{x=-\mathrm{\infty }}^{\mathrm{\infty }}\frac{k}{\underset{y\to 0}{\lim }\hat{q}\times x}$

$\underset{y\to 0}{\lim }\hat{q}\times x$

same basic code for these symbols, but when they are inside other elements, super- and subscripts don't align properly!