$10z^3 - 6y^3 -2y^2$
Work Step by Step
We simplify by removing the parentheses and then add the like terms as follows: $$ (14z^3 - 6y^3) -(2y^2 + 4z^3)\\ =14z^3 - 6y^3 -2y^2 - 4z^3\\ =10z^3 - 6y^3 -2y^2 .$$
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