Math

(2x^2 - 7x^3 + 4x^4) + (8x^4 + 9) + (3x^3 + 5x^2)

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(2x^2 - 7x^3 + 4x^4) + (8x^4 + 9) + (3x^3 + 5x^2)

2x^2 - 7x^3 + 4x^4 + 8x^4 + 9 + 3x^3 + 5x^2

2x^2+ 5x^2 - 7x^3+ 3x^3 + 4x^4 + 8x^4 + 9

7x^2 - 4x^3 + 12x^4 +9