Combinar entero en la lista

l1 = [2,4,3]
l2 = [5,6,4]
str1=[str(i) for i in l1]
lst1=''.join(str1)
str2=[str(j) for j in l2]
lst2=''.join(str2)
sum_of_int = int(lst1)+int(lst2)
sum_of_int
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