Answer:
[tex] \underline { \boxed{ans = \: {4y}^{2} - {2z}^{4} \: }}[/tex]
Step-by-step explanation:
[tex]4x+3y^2-7z^4+5z^4+11-4x+y^2 \\ to \: simplify....we \: \underline{\boxed{add \: or \: subtract}} \: like \: terms \to \\ (4x - 4x) +( {3y}^{2} + {y}^{2} ) + ( {5z}^{4} - 7 {z}^{4} ) \\ 0 + {4y}^{2} - {2z}^{4} \\ ans \: = {4y}^{2} - {2z}^{4}[/tex]
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