Which polynomial correctly combines the like terms and puts the given polynomial in standard form?

one-thirdx + 8x4 – two-thirdsx2 – x

8x4 – one-thirdx2 – x
8x4 + two-thirdsx2 + two-thirdsx
8x4 – two-thirdsx2 – two-thirdsx
8x4 – two-thirdsx2 – x