65-（2x+1)(4x^2-2x+1)+8x(x+2)^2=32(x-3)^265+8x(x^2+4x+4)=32(x^2-6x+9)+（2x+1)(4x^2-2x+1)65+8x^3+32x^2+32x=32x^2-192x+288+8x^3-4x^2+2x+4x^2-2x+1224x=224x=1