初一:(5+1)(5平方+1)(5的四次方+1)(5的八次方+1)=?

(5+1)(5平方+1)(5的四次方+1)(5的八次方+1) =(5-1)(5+1)(5^2+1)(5^4+1)(5^8+1)/4 =(5^2-1)(5^2+1)(5^4+1)(5^8+1)/4 =(5^4-1)(5^4+1)(5^8+1)/4 =(5^8-1)(5^8+1)/4 =(5^16-1)/4