Respuesta :

SaroUzahro

Answer: 5x^4+2x-5

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

Step-by-step explanation:

first, add/subtract the numbers with the same exponent:

4x^4+x^4=5x^4

5x^3-5x^3=0

and that's it!

move the other numbers down:

5x^4+2x-5