A problem about the sawtooth response of a system.

Hello everyone!

I have a problem with symbolic calculus (nothing special), it relates to a project of mine, and regards the calculation of the response to the sawtooth of a system with a known transfer function. As it is making me lose a lot of time, I ask help to a mathematician experienced on the subject and that he can fix it. I have attached the file containing the worksheet.

Thank you very much.