Untitled

class Probe:
    def summ(self,x,y):
        self.summ = x+y
        return self.summ
    
    def umn(self, x,y):
        self.umn = x*y
        self.summ = x*3*y*self.summ
        return self.summ#self.umn
    
    def square(self,x,y):
        self.square = x**y
        return self.square

a = Probe()

print(a.summ(2,3))
print(a.umn(2,3))
print(a.square(2,3))

вывод
5
90
8