Question: maple get stuck whne solving a lengthy expression


            i am try to solve lagrange dynamics in maple , i have problem with the solution , the maple make the solution but it get stuck after some time and maple is closed.. wheh i am  using inertia withoutout transformation matix , maple solve the equation but when i transform the inertia matrix  using transformatin matix, i am getting this problme, can any brother help in this regard, the file is attached..

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