11(5^2+6^2)(5^4+6^4)……(5^64+6^64)
=(5+6)(5^2+6^2)(5^4+6^4)……(5^64+6^64)(5-6)/5-6
=-(5^2-6^2)((5^2+6^2)(5^4+6^4)……(5^64+6^64)
=-(5^64-6^64)(5^64+6^64)
=-(5^128-6^128)
=6^128-5^128
11(5^2+6^2)(5^4+6^4)……(5^64+6^64)
=(5+6)(5^2+6^2)(5^4+6^4)……(5^64+6^64)(5-6)/5-6
=-(5^2-6^2)((5^2+6^2)(5^4+6^4)……(5^64+6^64)
=-(5^64-6^64)(5^64+6^64)
=-(5^128-6^128)
=6^128-5^128