Add together \( 4+3 x^{2}+x^{3}, x^{3}-x^{2}-11, x^{3}-2 x^{2}+7 \), and subtract \( 2 x^{3}+x^{...

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Add together \( 4+3 x^{2}+x^{3}, x^{3}-x^{2}-11, x^{3}-2 x^{2}+7 \), and subtract \( 2 x^{3}+x^{2}-7 \) from the result.
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