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Some inline maths: $\sum_{n=1}^\infty \frac{(-1)n}{n} = \ln 2$.
Some display maths:
\[ \sum_{n=1}^\infty \frac{1}{n} \text{ is divergent, but } \lim_{n \to \infty} \sum_{i=1}^n \frac{1}{i} - \ln n\; \text{ exists.}\]
Some random AMSTeX symbols - thanks to Robin Snader for adding these:
\[ \beth \Subset \bigtriangleup \smile \bumpeq \ggg \pitchfork\]
Etcetera.
And this is tttt!
And $\color{purple}a +\color{red} b$
$\displaystyle\href{http://feinsilverforum.org}{b+a-\frac{a}{b}}$
$$\begin{pmatrix} 3 & 4\\ 4 & 5 \end{pmatrix}$$ $$ \begin{vmatrix}3 & 4\\ 4 & 5\\ \end{vmatrix}$$
Consider the Lie algebra $\mathfrak{g}$.
It is not necessarily solvable.
If $5\lt 6$ then punt.
$$\begin{cases}3 & 5\\ 2& hello, if x\lt 5 \end{cases}$$
“ Go Here ”:http://chanoir.math.siu.edu for more