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Questions  >>  Olympiad-Math  >>  Class 8
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Find the sum of $5+x-x^2-x^3, 3x -5+2x^2-x^3, x+5+2x^3-5x^2$

$\begin{array}{1 1} 5+5x-4x^2+0x^3 \\ 5-5x+4x^2 \\ 5+5x+4x \\ 5+5x+4x^2+0x^3 \end{array} $

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