Starting with
Find the solution \(z\) of equation
Where \(u\) now is a symbol. Lets say we found \(s_{1},s_{2},\cdots \) solutions (depending on what \(n,m\) are). Then for each solution \(s_{i}\) change it to be
Then write
Then replace each with letter \(u\) in each \(s_{i}\) by new letter say \(z\) (the integration variable). Now the solution becomes
This is basically what was done in the above examples. There is no need to find an explicit solution for the integral. But this can be done if needed afterwords.