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D( x )
x = 0
x^-3 = 0
(((((x^7)/16)*y^1)/2)/(x^-3))/16 = 0
x = 0
x = 0
x^-3 = 0
x^-3 = 0
1*x^-3 = 0 // : 1
x^-3 = 0
x naleu017Cy do O
(((((x^7)/16)*y^1)/2)/(x^-3))/16 = 0
(((((x^7)/16)*y^1)/2)/(x^-3))/16 = 0
(((((x^7)/16)*y)/2)/(x^-3))/16 = 0
1/512*x^10*y = 0 // : 1/512*y
x^10 = 0
x = 0
x in (-oo:0) U (0:+oo)
((((((x^7)/16)*y^1)/2)/(x^-3))/16)^-8 = 0
((((((x^7)/16)*y)/2)/(x^-3))/16)^-8 = 0
4722366482869645213696*x^-80*y^-8 = 0 // : 4722366482869645213696*y^-8
x^-80 = 0
x naleu017Cy do O
x belongs to the empty set
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