1. 1Вычислите рациональным способом: а) 92 ^ 2 - 82 ^ 2
б) 42 ^ 2 - 2 * 42 * 39 + 39 ^ 2
B) 37 ^ 3 + 3 * 37 ^ 2 * 63 + 3 * 37 * 63 ^ 2 + 63 ^ 3​
очень надо
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