@Kitonum 

Could you explain what is the purpose of

for x in {0,1} do

And what

if C

means here?

@Carl Love yes you are right. I meant multiplication modulo 42

Ok so do I need to Residue Theorem and then use the residue function to evaluate the integral? Is Maple not able to compute the integral directly?

@mmcdara Could you explain what line 2 and 3 do? What does the percentage symbol means in plot(%...)?