题目链接：acm.romani.cn/download/2019freshmen-online.pdf

样例输入#1

Qw  er(2/3+orzhuaxu1/4)*  3/4

样例输出#1

11/16

样例输入#2

Zlyoqcvkel11111/1*-9/1

样例输出#2

-99999/1

样例输入#3

Hi, (dear1 acmer/6, welc*ome to6 Xidian Un/iversity.1 I'm sure y)ou love *this c6ompet6ition ve6ry /much. Come on, go1 go go,for our dream!