def Polynome(arr): map = "x²" x="" for i in range(3): if (len(arr)>i and arr[i]!=0): if (len(x)>0): x+="+" x+=str(arr[i])+map[0:i] if len(x)==0: x="0" return x print((1,2,3), Polynome((1,2,3))) print((0,0,3), Polynome((0,0,3))) print((0,0,0), Polynome((0,0,0)))