1/
6x^4-(x^2-x)y^2-(y+12)x^2=-6
5x^4-(x^2-1)y^2-11x^2=-5
2/
( x-2011 )( 2011+2012\sqrt[3]{y-2013} )=1
( \sqrt[3]{x-2010}) ( y-4024 )= 2012
3/
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1/
6x^4-(x^2-x)y^2-(y+12)x^2=-6
5x^4-(x^2-1)y^2-11x^2=-5
2/
( x-2011 )( 2011+2012\sqrt[3]{y-2013} )=1
( \sqrt[3]{x-2010}) ( y-4024 )= 2012
3/