(3+1)(3的2次方+1)(3的4次方+1）…(3的32次方+1)-3的64次方/2=(3-1)(3+1)(3^2+1)(3^4+1)…(3^32+1)/(3-1)-3^64/2=(3^2-1)(3^2+1)(3^4+1)…(3^32+1)/2-3^64/2=(3^4-1)(3^4+1)…(3^32+1)/2-3^64/2=(3^8-1)…(3^32+1)/2...