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[tex]7x^{5}+6x^{3}-3x+2-(4x^{8}+3x+5)\\\\7x^{5}+6x^{3}-3x+2-4x^{8}-3x-5\\\\-4x^{8}+7x^{5}+6x^{3}-3x-3x+2-5\\\\-4x^{8}+7x^{5}+6x^{3}+(-3x-3x)+(2-5)\\\\\boxed{-4x^{8}+7x^{5}+6x^{3}-6x-3}\\c\ is\ the\ answer.[/tex]

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