How to solve a complicated Equation in Numbers?

I have to calculate the solutions of a complicated equation in Numbers. I have tried to find functions that finds the zeros of a expression, or thought of setting up while loops that runs until the error term is almost 0, but I cannot find any such thing. Can anyone help me figure out how I can set this up in Numbers? This is something that can easily be done with a graphing calculator such as TI-83, but I have many inputs that can vary in my spreadsheet.
Thanks.

There is no such a feature in Numbers.
_Go to "Provide Numbers Feedback" in the "Numbers" menu_, describe what you wish.
Then, cross your fingers, and wait _at least_ for iWork'10
Yvan KOENIG (from FRANCE dimanche 1 mars 2009 16:10:52)

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