(1/3xy)^2×(-12x^2y^2)÷(-4/3x^3y)=(1/9)x^2y^2 × (-12)x^2y^2 ÷ (-4/3)x^3y=(1/9)*(-12)*(-3/4) x^(2+2-3) y^(2+2-1)=xy^3
