（a-0.5)的平方（ a的平方+0.25)的平方(a+0.5)的平方
=[(a-0.5)(a+0.5)]^2[(a^2+0.25)]^2
=[a^2-0.25]^2[a^2+0.25]^2
=[(a^2-0.25)(a^2+0.25)]^2
=[a^4-1/16]^2
=a^8-a^4/8+1/256
(2x-3y-1)(-2x-3y+5)
=[(2x-3y)-1][5-(2x+3y)]
=5[2x-3y]-[2x-3y][2x+3y]-5+2x+3y
=10x-15y-4x^2+9y^2-5+2x+3y
=-4x^2+9y^2+12x-12y-5
化简：(2+1)(2*2+1)(2*2*2*2+1)(2*2*2*2*2*2*2*2+1)+1
=(2-1)(2+1)(2^2+1)(2^4+1)(2^8+1)+1
=(2^2-1)(2^2+1)(2^4+1)(2^8+1)+1
=(2^4-1)(2^4+1)(2^8+1)+1
=(2^8-1)(2^8+1)+1
=2^16-1+1
=2^16