Linebrake in a TaBlE cell

[Tobias Burnus <burnus@gmx.de>]

Hi,

I think this is rather simple and strait forward (hopefully),
but how can I have more than one line in a table cell.

I.e.:

------------------------------------------------------------------
This is one line                 | And here is only one line
second                           |
and a third line, which is long  |
------------------------------------------------------------------
Hiere is one long line, which    | Line 1
continues in the next lines, but | Line 2
which has no hard linebrake      |
------------------------------------------------------------------

How can I do so?

Tobias

PS: I just saw the following as a LaTeX question, but the (AMS)MathModul
of ConTeXt should manage this as well:
> |     +-----------------------+          |
> |     |                       |          |
> |     |        m * c^2 = E    |  (1)     |
> |     |                       |          |
> |     |      a^2 + b^2 = c^2  |  (2)     |
> |     |                       |          |
> |     |  m (a^2 + b^2) = E    |  (3)     |
> |     |                       |          |
> |     +-----------------------+          |

I.e. the numbers of the equations are outside the drawn box.
N.B.: TeXperts and TeXnician must not answer, but should keep it
in mind when designing the math modzul.