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Автор - lina84135

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Автор - Universalka

frac{57^{3}-43^{3}}{14}+57*43=frac{(57-43)(57^{2}+57*43+43^{2}}{14}+57*43=frac{14(57^{2}+57*43+43^{2})}{14}+57*43=57^{2}+57*43+43^{2}+57*43=57^{2}+2*57*43*43^{2}=(57+43)^{2}=100^{2}=10000

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