Question: Simplifying long expressions

I want to simplify an expression via simplify();

However since the expression is very long (length(expression)=2713899) Maple is taking too long...So far one hour.

I have already simplified several expressions of a similar kind with lengths of up to 400.000 which worked fine within minutes.

Is there any way to speed up the process. Am I making a mistake?

Thanks in advance

Please Wait...