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((a^3*((((6*a^2*b^7)/25)*x^3*y)/12)*b^4)/5)*x^2*y^2 = 0
1/250*a^5*b^11*x^5*y^3 = 0 // : 1/250*a^5*b^11*y^3
x^5 = 0
x = 0
x = 0
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