a³ - b³ = (a - b)(a² + ab + b²)
579^3-579^2-579*578-578^2-578^3 = 579^3-578^3 -(579^2 + 579*578+ 578^2) = (579 - 578)(579^2 + 579*578+ 578^2) - (579^2 + 579*578+ 578^2) = (579^2 + 579*578+ 578^2) - (579^2 + 579*578+ 578^2) = 0
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a³ - b³ = (a - b)(a² + ab + b²)
579^3-579^2-579*578-578^2-578^3 = 579^3-578^3 -(579^2 + 579*578+ 578^2) = (579 - 578)(579^2 + 579*578+ 578^2) - (579^2 + 579*578+ 578^2) = (579^2 + 579*578+ 578^2) - (579^2 + 579*578+ 578^2) = 0