[x-0.5]^2+[y^2-1]+[z^2-1]=0.7

[x-0.5]^2+[y^2-0.8]+[z^2-0.8]=0.5

y^2+[1.5*z-0.45]^2+[x-2]^2=0.08

0.5*y^2/sqrt(2)+[[z+0.14]/sqrt(2)]^2+[x-2]^2=0.05

Graph of the formula

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