What's the algebraic expression of "4 times a number cubed decreased by 7"?

Statement:  "4 times a number cubed decreased by 7"

Let a number be  x is denoted as an arbitrary variable.

Now, cubed means raise x to the third power  i.e

then, 4 times a number cubed i.e

Decreased by 7 means, subtract 7  

⇒

Therefore, the algebraic expression for the given statement is,

d is correct

step-by-step explanation:

it would be 6xy and -16xy.