Let $f: R \rightarrow R$ and $g: R \rightarrow R$ be defined by $f(x)=2x+1$ and $g(x)=x^2-2$. Determine $(g \circ f)(x)$.

  • A
    $2x^2-3$
  • B
    $4x^2+4x-1$
  • C
    $4x^2+4x+1$
  • D
    $2x^2-4$

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