Photos Y 1 5X 4

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Y 1 5x 4. (X^2-Y^2)/(1-X^2). Y=X^2+1/X^2-1. X2y+1-x2-y. Y=2(X-1)^2+1.
(X^2-Y^2)/(1-X^2). Y=X^2+1/X^2-1. X2y+1-x2-y. Y=2(X-1)^2+1.

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