Find the algebraic sum of three times the square of \( x \), twice the cube of \( x,-x^{3}+x-2 x...

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Find the algebraic sum of three times the square of \( x \), twice the cube of \( x,-x^{3}+x-2 x^{2} \), and \( x^{3}-x-x^{2}+1 \)
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