Example: See π‘₯⁴ – 𝑦⁴ as (π‘₯Β²)Β² – (𝑦²)Β², thus recognizing it as a difference of squares that can be factored as (π‘₯Β² – 𝑦²)(π‘₯Β² + 𝑦²), and further to (π‘₯ - 𝑦)(π‘₯ + 𝑦)(π‘₯Β² + 𝑦²).

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