14. Найдите значение алгебраического выражения. 2(x-y) x + y 1) 2) 3) " здесь х =-2,y=3 2ху(х - у) x + y 4)- . 5(n · m - k) 2p-k -, здесь, х = 5(a.b+c) 2+c — 2, y = 3 , 2' 1 3 здесь _ m = – 1, n = 1, k = 3, p = 2 -, здесь а = -2, b = 2, c = 1​
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