Given that $3x^2-2(x^2+4)=42$, what is the value of $x^4$?
Question:
Given that $3x^2-2(x^2+4)=42$, what is the value of $x^4$?
Answer:
Let's think step by step.

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Given that $3x^2-2(x^2+4)=42$, what is the value of $x^4$?
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