Images 1 2X2

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1 2x2. X 2 2xy y 2 2x. (1-X^2)Y'-XY=XY^2. Y^2/X^2-XY+X^2/Y^2-XY=1. (1+X^2)Y'-2xy=(1+x^2)^2.
X 2 2xy y 2 2x. (1-X^2)Y'-XY=XY^2. Y^2/X^2-XY+X^2/Y^2-XY=1. (1+X^2)Y'-2xy=(1+x^2)^2.

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