Respuesta :

-4x^2+16x-3 is your answer

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Answer:

-4x^2 +16x -3

Step-by-step explanation:

2x + 3x^3 - 5x^2 + x^2 +7x + 1+ 7x -3x^3 - 4

Line up the numbers in decreasing power

3x^3 -3x^3 - 5x^2  + x^2 +7x +2x+ 7x - 4+1

Combine like terms

-4x^2 +16x -3