So you want the Gaussian integral trick again? @blackpenredpen

Uploaded January 2026 | Updated September 2026, 2 weeks ago

To me, the Gaussian integral (i.e. the integral of e^(-x^2) from neg inf to pos inf) is the greatest integral of all time (because of how genius the polar coordinate solution is!). I have been wondering if there's another integral that requires a similar approach. After many tries, I came up with a double integral example! Enjoy!

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