Curva(O + t i + f(t) j, t, x(Esquina(1)), x(Esquina(2)))

O = (0, 0)
f(x) = x^(3) + 1
i = (1, 0)
j = (0, 1)
g = Invert(f)
a = CurveCartesian(O + (t * i) + (f(t) * j), t, x(Corner[1]), x(Corner[2]))