+43 Four circles of unit radius are drawn with centers (1,0), (-1,0),(0,1), and (0,-1). A circle with radius 2 is drawn with the origin as its center. What is the area of all points that are contained in an odd number of these 5 circles? ( express your answer in the form "a pi + b" or "a pi - b", where a and b are integers.)
thanks
