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plot 0 < max((1-((x+0.9)^2)*128-y^8), (1-((x+0.9+(y-1)*0.4)^2)*128-y^8), (1-((x+0.1)^2)*128-y^8), 0.3^2-((x*2.3-1.3)^2+y^2-0.7)^2)
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