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Thank you a lot! That was exactly I was looking for!
You made my day!

Oh, I am sorry I didn't mention that!

Here's the code:

\begin{equation} \left[\begin{array}{c} \begin{array}{c} \dot{s}
\end{array}\\ \dot{v}\end{array}\right]=\left[\begin{array}{cc}
0 & 1\\ 0 & \underbrace{-\frac{d_{m}}{m_{red}}}_{Reibverl.}
\underbrace{-\frac{i_{\textrm{A}}^{2}k_{m}^{2}}
{r ...

Hi,

I got a "problem" (if you can call it one) with brackets under entries in a matrix:
They affect the brackets of the matrix, so the whole thing looks kind of weird, because the bracket "get's part of the matrix entry" and causes a higher bracket.
Is it possible to arrange the brackets "under ...