Respuesta :

Hello from MrBillDoesMath!

Answer:

The last choice on the list,  -z/y^7

Discussion:

- (14x)^0 y^-7 z              => m^0 = 1 if m <> 0

-1         * y^-7 z             => y^-7 = 1/y^7

-z/y^7, which is the last choice on the list

Thank you,

MrB