(x²+y²-1)³- x²y³ = 0 (x²+y²-2)³- x²y³ = 0 (x²+y²-3)³- x²y³ = 0 (x²+y²-4)³- x²y³ = 0 (x²+y²-5)³- x²y³ = 0 (x²+y²-6)³- x²y³ = 0 (x²+y²-7)³- x²y³ = 0 (x²+y²-8)³- x²y³ = 0 (x²+y²-9)³- x²y³ = 0 (x²+y²-10)³- x²y³ = 0 (x²+y²-11)³- x²y³ = 0 (x²+y²-12)³- x²y³ = 0 (x²+y²-13)³- x²y³ = 0 (x²+y²-14)³- x²y³ = 0 (x²+y²-15)³- x²y³ = 0 (x²+y²-16)³- x²y³ = 0 (x²+y²-17)³- x²y³ = 0 (x²+y²-18)³- x²y³ = 0