Question: How can I stop maple expanding an expression ?

If I extract the denominator of the following expression


> s:=(1/2/Pi+Q*(1-u^2)/(1+u^2))^2/((1+beta^2*(1/2/Pi+Q*(1-u^2)/(1+u^2))^2)*(1+u^2));

maple expands it automatically


but the result of solving the expanded denominator



is different to the result of solving the non-expanded expression





and so I would ideally like to prevent the expansion of the expression. I have tried frontend and indets commands but to no avail; is there a function you could suggest that would prevent the expansion?



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