1/7+3/8+7/36+29/56+37/63+41/72+53/77+29/84+3/88
=
39*148/149+148*149/86+48*14/149
(1-1/2*2)*(1-1/3*3)*```````*(1-1/10*10)
1/1+2+1/1+2+3+1/1+2+3+4+```````1/1+2+3+````+50
要清楚这有点难度所以
欧也!