2(x + 1) - 3(x - 1), - x + 5, - x - 5, - x - 1, 5(x - 2) - 4(x + 2), x + 2, x - 18, x + 4, (x - 4)(x + 7), x2 +11x - 28, x2 + 3x - 21, x2 + 3x - 28, (-7x2)3, - 343x5, - 343x6, 343x6, (12x)15 : (12x)3, (12x)12, (12x)5, 112, 0,2x · 0,3y · 0,4z, 24xyz, 0,24xyz, 0,024xyz, 5(x + 2y) - 3(x + 4y), 2x - 2y, 2x + 2y, 2x, (5x + 3)(2x - 4), 10x2 - 14x +12, 10x2 - 14x - 12, 7x2 + 14x - 12, 135x4 : 0,5x3, 270x, 27x, 2,7x, (60x7y3) : (- 6x3y) : (- 2x2y), - 5x2y, 5x2y, 20x6y3.

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