Polynomial Equation (y = f(x))

y = 10
x = 3
y = (x+5)(x+10)
x = (5-y)(y+4)
y = (x+1)(3y+5)(1-2y)
y = (x-2)(3-x)
y = x(x+2)(3-x)
y = x+5
y = (x+1)(x+2)(2x+1)(1-x)