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(((x^1*((((11*x^9)/2)*y^3)/25))/2)*y^7)/4 = 0
(((x*((((11*x^9)/2)*y^3)/25))/2)*y^7)/4 = 0
11/400*x^10*y^10 = 0 // : 11/400*y^10
x^10 = 0
x = 0
x = 0
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