(1+1/2)×(1-1/2)×(1+1/3)×(1-1/3)×…×(1+1/99)×(1-1/99)=6S.p4s)T1y)@.q+a5g2C/n*V6g+W9a:\)Z
算式:提示4^6Z.h*w0b-\+V1c3w:r/n*V6g+W9a:\)Z