how to prevent decomposition

On Thursday 11 December 2003 00:10, Richard Fateman wrote:
>Valery Pipin wrote:
>>I'm stuck about one "simple" problem
>>I have to keep the "b^2-1" from decomposition to "(b-1)*(b+1)"
>
>This won't happen unless you factor.   try
>dontfactor:[b];
Yes! That's it. Thank you very much

rgds,
Valery