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x^2*y^2*((5*x^3*y^-3*z^1)/3)*z^-4 = 0
x^2*y^2*((5*x^3*y^-3*z)/3)*z^-4 = 0
5/3*x^5*y^-1*z^-3 = 0 // : 5/3*y^-1*z^-3
x^5 = 0
x = 0
x = 0
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