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Well since apparently AbnormalButSane haven't read complex analysis yet, which is a requirement for Fourier analysis which in turn is a requirement to understand what the sum within the integral is, I'll spell it out to you.
The sum equals one, meaning we have a integral over x from 0 to 2√(30) which is 60.
60 + 0.91 = 60.91.
I'm disappointed in you!