python_class_for f(x) = -5 x5 + 69 x2 - 47 as a Python function

#Implement the mathematical function
#f(x) = -5 x5 + 69 x2 - 47 as a Python function.
#Then use Python to compute the function values
#f(0), f(1), f(2), and f(3).
#Enter the maximum of these four numbers

class fx:
    def __init__(self,x):
        self.x=x
    def __str__(self):
        return ("You are MR.",str(self.x))

    def cl(self):
        #f(x) = -5 x5 + 69 x2 - 47
        self.a=-5*self.x**5+69*self.x**2-47
        print(self.a, "for", self.x)


a=fx(0)
a.cl()

a=fx(1)
a.cl()

a=fx(2)
a.cl()

a=fx()
a.cl()