53. One of the following is not written in standard form. Which is it?

a. -2x3 + 2x2 + 3x - 10
b. x - x - x
C. X + 1
d. -5x5 + 6 + 6x

54. What is the sum when 8x + 3x2 + 5 is added to -7x2 + 3x - 6?

a. -4x2 + 11x + 1
b. 4x2 + 11x - 1
c. -4x2 + 11x-1
d. 4x2 + 11x + 1

55. What is the difference between x-2x2 + 3 and x2 + 7x + 1?

a. -x2 - 6x + 2
b. -3x2 - 8x + 4
C.-3x2 - 6x + 2
d. 4x2 + 11x-1

56. What must be subtracted from 2y3 – 3y - 5 to get 4y3 – y-1?

a. 2y + 2y - 4
b. 6y + 4y - 6
c. -2y3 - 2y - 4
d. 6y3 - 4y + 6 - -​