Let f (x)= [2x^2 +1] and g(x)={:{(2x-3,...

Let `f (x)= [2x^2 +1]` and `g(x)={:{(2x-3,xlt0),(2x+3,xge0):}` where [t] is the greatest integer `le` t. Then, in the open interval (-1, 1), the number of points where fog is discontinuous is equal to ______

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