code: def Cube(x, a, b, c, d):
      
      return a * x ** 3 + b * x ** 2 + c * x + d
docs: Third order polynomial
  
      Inputs:
      -------
          ``x``: independent variable
          ``a``: coefficient of the third-order term
          ``b``: coefficient of the second-order term
          ``c``: coefficient of the first-order term
          ``d``: additive constant
  
      Formula:
      --------
          ``a*x^3 + b*x^2 + c*x + d``