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x*y^1*((3*x*y^2*z^4)/2)*z^3 = 0
x*y*((3*x*y^2*z^4)/2)*z^3 = 0
3/2*x^2*y^3*z^7 = 0 // : 3/2*y^3*z^7
x^2 = 0
x = 0
x = 0
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