I have a problim with my sensor technology task, I don´t know how to get the transfer function correctly from U0 to U3.
Any help is highly appreciated

 

Start with U3=U10+U2.

Then find U10 and U2 and continuou until you reach U0.

Then, if possible, move all U0 terms to left side, all U3 to right side (or vice versa) and divide to find U3/U0. If not possible use partial fractions.