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y=((sin(x))^2+(1.5-cos(x))^2)^0.5-1.5 + ((sin(x+π))^2+(1.5-cos(x+π))^2)^0.5-1.5
y=((sin(x))^2+(1.5-cos(x))^2)^0.5-1.5 + ((sin(x+π))^2+(1.5-cos(x+π))^2)^0.5-1.5
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