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-16mn{2} [/tex]+ 2my+ 3wy3+ 7wy
-8xy2+ 4y2+4y2x+2
4mx o 4xm
2x-2yx2
-16mn^2+2my+7wy+3wy3
-8xy^2+8y^2+2
4mx
2x-2yx2