2 2 s - r - 22*s + 121
s^2 - r^2 - 22*s + 121
1*(r + -11 + s)*(r + 11 - s)
(1*(r - (11 + s)))*(r + (11 - s))
-(-11 + r + s)*(11 + r - s)
121.0 + s^2 - r^2 - 22.0*s