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Plot[HeavisideTheta[2 - s] (-((-2 + s) HeavisideTheta[-2 + s]) + (-1 + HeavisideTheta[1 - s]) HeavisideTheta[2 - s] (-1 + (-1 + s) HeavisideTheta[-1 + s]) + s HeavisideTheta[1 - s, s]),{s,0,2}]
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