Heart: $0=\left( x^{2}+y^{2}+\frac{9z^{2}}{4}-1 \right)^{3}-y^{3}\left( x^{2}+\frac{9z^{2}}{80} \right)$

$0=\left( x^{2}+y^{2}+\frac{9z^{2}}{4}-1 \right)^{3}-y^{3}\left( x^{2}+\frac{9z^{2}}{80} \right)$