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Let f: R rarrR be defined by f(x)={{:(x+...

Let `f: R rarrR` be defined by `f(x)={{:(x+2, (xle-1)),(x^(2), (-1lexle1)),(2-x), (xge1)):}`. Then the value of `f(-1.75)+f(0.5)+f(1.5)` is

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