Lim (x->3) (2x^-3x-4)

= Lim (x->3) (2(3)^-3(3)-4)

= Lim (x->3) (2(1/27) - 9 - 4)

= Lim (x->3) (2/27 - 13)

= 2/27 - 13

= -25 1/27