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(x^9)/8+64*y^6 = 0
1/8*x^9 = -(64*y^6) // : 1/8
x^9 = -512*y^6
x^9 = -512*y^6 // ^ 1/9
x = -2*y^(2/3)
x = -2*y^(2/3)
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