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OpenStudy (anonymous):
subtract (1.4x^3+4.5x^2-3.4x)-(-4.2x^3-4.9x^2+99)
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jhonyy9 (jhonyy9):
there is 1,4x3 +4,2x3 4,5x2 +4,9x2 -3,4x -99 ---------------------- 5,6x3 +9,4x2 -3,4x -99
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