(1)(-3x^2y)^3*xyz*(-1/3xy)^2 (2)(x-2y+4)(x+2y-4) (3)(-3)^0+(-1/2)^-2/l-2l

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(1)(-3x^2y)^3*xyz*(-1/3xy)^2 (2)(x-2y+4)(x+2y-4) (3)(-3)^0+(-1/2)^-2/l-2l
(1)(-3x^2y)^3*xyz*(-1/3xy)^2 (2)(x-2y+4)(x+2y-4) (3)(-3)^0+(-1/2)^-2/l-2l

(1)(-3x^2y)^3*xyz*(-1/3xy)^2 (2)(x-2y+4)(x+2y-4) (3)(-3)^0+(-1/2)^-2/l-2l
(1)(-3x^2y)^3*xyz*(-1/3xy)^2
=(-27x^6y^3)×xyz×1/9x^2y^2
=-3x^9y^6z

(2)(x-2y+4)(x+2y-4)
=[x-(2y-4)][x+(2y-4)]
=x²-(2y-4)²
=x²-4y²+16y-16

(3)(-3)^0+(-1/2)^-2/l-2l
=1+4/2
=3