（a+1)(a-1)(a²+1)(a四次方+1)(a八次方+1)=(a²-1)(a²+1)(a^4+1)(a^8+1)=(a^4-1)(a^4+1)(a^8+1)=(a^8-1)(a^8+1)=a^16-1(-2a+b)(3a-b)-(a+b)(a-b)=（-6a²+5ab-b²）-（a²-b²）=-7a&...