I don't know why I'm commenting; I never do. However, I saw those formulas, and I had to say something. (Idk how to use this comment system)
The formula written for the Breast Equations "works" (not entirely though from reasons soon explained).
[ y = sqrt(r - (|x| - c)^2) ] written is derived from the Circle formula [ x^2 + y^2 = r^2 ].
r is the radius. c is the position of the center of the circle. x, y obviously create the shapes
the Absolute Value of x [denoted |x|] puts the two semi-circle on the left and the right sides (Quadrants I and II) to get the two lumps of the Breasts. Not a bad start here (but his Breast semi-circles drawn have inconsistent Radii).
HOWEVER, throwing two random smaller semi-circle for the nipples is NOT good enough. Because it's a semi-circle, you have one round side but one flat horizontal side.
The kid did not account for this, so the nipples are technically unattached. He would either change the formula or lower the position of those smaller figures.
(Idk how to insert image to demonstrate this. )
TL;DR Good start on the breast formula, but nipples have been unfortunately removed from the breasts.