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acos((2*150^2-(200^2/4+200*x+x^2+y^2))/(2*150^2))*10+(pi/2-atan(-y/(200/2+x))+(pi-acos((2*150^2-(200^2/4+200*x+x^2+y^2))/(2*150^2)))/2)*(10-1) from x =-100 to 100, from y= 0 to y=-200
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