-(-2)^0*(-2)^3*(-2)^-4/(-2)^3

-(-2)^0*(-2)^3*(-2)^-4/(-2)^3

n^0=1 for any n≠0, so
-1*(-2)^3*(-2)^-4/(-2)^3

(-2)^3 = -8 and (-2)^-4 = 1/16, so
-(-8)(16)/(-8)
-1/16