Answer :

[tex] 10xy^2 + 5x - 4y^3 + 6 -x + 5x^2y + 6xy^2 - 2=\\ 4x+16xy^2+5x^2y-4y^3+4[/tex]
10xy^2+6xy^2
+5x-x
-4y^3
+6-2
+5x^2y
16xy^2+4x-4y^3+4+5x^2y

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