Mathematics, 23.03.2021 02:00, caromaybelline71

Perform the operation to simplify (-2x^4 + x^2 - x - 9) + (x^4 -x^3 -5x +3)

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Perform the operation to simplify (-2x^4 + x^2 - x - 9) + (x^4 -x^3 -5x +3)...