Which expression is a difference of cubes?

Option 4 is correct.

Step-by-step explanation:

Given the following options

we have to choose the difference of cubes.

Option 1:

which is not the difference of cubes

Option 2:

which is not the difference of cubes

Option 3:

which is the difference of square

Option 4:

which is the difference of cubes.

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol

one peck is 9.309 quarts

9.309x 2