Need help with Thick Wall Cylinders Exact solutions coding

I hope someone will be able to help me with matlab. I am a novice at matlab and have to create a matlab code that will solve a system of 2 ordinary differential equations with boundary conditions. This however has to be in symbolic form. i have been looking everywhere for some sort of help on how i cn create this code and how to get around the fact that there are no numbers involved. I appreciate your help!