−6x + 7x - x, 12x − 8 − 12 - 12x - 20, −4x − 10x - -14x, −2x + 11 + 6x - 4x + 11, −x + 12x - 11x, −x − 10x - -11x, −2x + 12x - 10x, −8x − 11x - -19x, x + 4 − 9 − 5x - -4x - 5, 5x + 11x - 16x, 12x + 5 + 3x − 5 - 15x, −5 + 9x + 6 - 1 + 9x, −3x − 9 + 15x - 12x - 9, 15x − 19x - -4x, −16x − 14x - -30x, x + 10 - 3x + 3 - -2x + 13, x + 10 + 7 + 3x - 4x + 17, 3 - 7x + 9x - 4 - -1 + 2x, 6x - 5 + 2x + 3 - -2 + 8x, -x + 4 + 10x - 1 - 9x + 3,

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