𝑥² + 2𝑥 + 1 - (𝑥 + 1)², 49 + 14𝑥 + 𝑥² - (𝑥 + 7)², 𝑥² - 10𝑥 + 25 - (𝑥 - 5)², 𝑥² - 2𝑥 + 1 - (𝑥 - 1)²,

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