which of the following is not equal to x^3
Ax^5 x^-4 x^2
Bx^-2 x^9 x^-4
Cx^0 x^10 x^-7
Dx x^7 x^4
Ax^5 x^-4 x^2
Bx^-2 x^9 x^-4
Cx^0 x^10 x^-7
Dx x^7 x^4