# Math Help - test for matrix's

1. ## test for matrix's

$\left( {\begin{array}{*{20}{c}} 8 & { - 1} \\ { - 34} & 6 \\ \end{array} } \right)$

Removing the  and replacing with  delimiters:

$\left( \begin{array}{*{20}{cc}}
8 & { - 1} \\
{ - 34} & 6 \\
\end{array} \right)$

2. sorry sorry
i was practicing latex, and must have accident clicked post instead of preview

3. Originally Posted by walleye
$\int_0^(2\pi) \kappa(s) ds = \int d\theta = \theta + c$
Code:
\int_0^{2\pi} \kappa(s) ds = \int d\theta = \theta + c
gives
$\int_0^{2\pi} \kappa(s) ds = \int d\theta = \theta + c$