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AHSME 1979 Problem 4

    For all real numbers x,x[x{x(2−x)−4}+10]+1=x, x[x\{x(2-x)-4\}+10]+1= (A) −x4+2x3+4x2+10x+1(B) −x4−2x3+4x2+10x+1(C) −x4−2x3−4x2+10x+1(D) −x4−2x3−4x2−10x+1(E) −x4+2x3−4x2+10x+1\textbf{(A) }-x^4+2x^3+4x^2+10x+1 \textbf{(B) }-x^4-2x^3+4x^2+10x+1 \\ \textbf{(C) }-x^4-2x^3-4x^2+10x+1 \textbf{(D) }-x^4-2x^3-4x^2-10x+1 \\ \textbf{(E) }-x^4+2x^3-4x^2+10x+1

    Dataset text NuminaMath-1.5. Quoted with source.

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