#include <stdio.h>
#include <stdlib.h>
int main(){
    int a,b,c,d;
    int m,n;
    int x,j,l,k;
    char e,f,g;
    while(scanf("%d%c%d%c%d%c%d",&a,&e,&b,&f,&c,&g,&d)!=EOF){
        if(f=='+'){m=a*d+b*c;n=b*d;}
        else {m=a*d-b*c;n=b*d;}
        k=abs(m);l=abs(n);
        int t;
        while(l!=0){
            t=k%l;
            k=l;
            l=t;
        }
        if(m==0)printf("0\n");
        else {
            x=n/k;j=m/k;
            if(x<0){
                j=-j;
                x=-x;
            }
            if(x==1)
            printf("%d\n",j);
            else printf("%d/%d\n",j,x);
        }
    }
    return 0;
}