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Let f:RrarrR be a function defined by f(...

Let `f:RrarrR` be a function defined by `f(x)={([x],x,le,2),(0,x,gt,2):}`
where [x] is the greatest integer less than or equal to x. If `I=int_-1^2(xf(x^2))/(2+f(x+1))dx`, then the value of (4I-1) is

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