To plot the love formula, you can plot two functions in one diagram:
$$y_1(x)=\sqrt[3]{x^2}+\sqrt{1-x^2}+1$$ $$y_2(x)=\sqrt[3]{x^2}-\sqrt{1-x^2}+1$$
Then you get: Plot love function
I calculated the surface inside the heart as, am I right of that:
$$2\int_{0}^{1}\left(\sqrt[3]{x^2}+\sqrt{1-x^2}+1\right)\space\text{d}x-2\int_{0}^{1}2\space\text{d}x+2\int_{0}^{1}2\space\text{d}x-2\int_{0}^{1}\left(\sqrt[3]{x^2}-\sqrt{1-x^2}+1\right)\space\text{d}x=\pi$$