It sounds impossible. But it turns out that infinity minus infinity doesn't necessarily equal zero. It can equal Pi, or 3.14159265359. Or so demonstrates the "Mathologer" in the video featured above.
In real life the Mathologer goes by the name of Burkard Polster, and he's a math professor at Monash University in Melbourne, Australia. You can check out more of his videos on YouTube here.
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