y ------------- x --------- + y x*c*p + 1
y/(x/((x*c)*p + 1) + y)
y*(1 + c*p*x) ----------------- x + y*(1 + c*p*x)
y*(1 + c*p*x)/(x + y*(1 + c*p*x))
y/(y + x/(1.0 + c*p*x))
y ------------- x y + --------- 1 + c*p*x
y/(y + x/(1 + c*p*x))
y*(1 + c*p*x) --------------- x + y + c*p*x*y
y*(1 + c*p*x)/(x + y + c*p*x*y)
x 1 - --------------- x + y + c*p*x*y
1 - x/(x + y + c*p*x*y)