class Base:
    def __init__(self, a, b):
        self.a = a
        self.b = b

    def sum(self):
        return self.a + self.b

    def diff(self):
        return self.a - self.b


class Derivate(Base):
    def product(self):
        return self.a * self.b

class Derivate2(Base):
    def __init__(self, a, b , c):
        super().__init__(a, b)
        self.c = c

    def quote(self):
        return self.a / self.c


class Common:
    def __init__(self, a, b):
        self.a, self.b = a,b
    def sum(self):
        return self.a + self.b

def makeMath(x:Base):
    s = x.sum()
    print(s)

t = Common(8,9)
makeMath(t)

x:Base = Base(1, 3)
makeMath(x)

y:Derivate = Derivate(3, 4)
makeMath(y)

z:Derivate2 = Derivate2(1, 2, 3)
makeMath(y)