I had a question;
What is the idea (in complex analysis) of integrating along a square? Take a look at @M.N.C.E.'s method on Evaluate $\int^1_0 \log^2(1-x) \log^2(x) \, dx$
I am not quite sure what the person means by integrating along an infinitely large square?
Can someone tell me where I can find more information about this? I don't have a lot of experience with complex analysis, and would like to learn about this method of squares etc.. and residues.
Help is appreciated!