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Calculați:

d) (x + 2) [7x - 4(x - 1)] - 27x^4: (-3x)^2;
c) x(2x - y) - (2x + y)[4x - 3(x - y)];
e) y(4x – 3y) + (x - y) [5x - 3(x + y)].​