Question: Simplifying a Huge Expression of SinCos and

Hello everybody

I need to simplify (or even approximate ) a huge expression which is a two-variable function of x and t,

including  SinCos and Exp. ( it's length is like 10 pages ! )

I tried everything but nothing worked.

 

Please HELP !

 

it starts like this:

 

Q(x,t):=

+ ...

Please Wait...