plot {2, 1, 0, -1, (x + 3) abs(x + 3), (x + 2) abs(x + 2), (x + 1) abs(x + 1), x abs(x), (x - 1) abs(x - 1), (x - 2) abs(x - 2), (x - 3) abs(x - 3)} x=-2.3..3.3 y=-1.8..2.8

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