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x-6 = (-1/6)*y^2 // - (-1/6)*y^2
x-((-1/6)*y^2)-6 = 0
x+(1/6)*y^2-6 = 0
x+1/6*y^2-6 = 0 // - 1/6*y^2-6
x = -(1/6*y^2-6)
x = 6-(1/6*y^2)
x = 6-(1/6*y^2)
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