#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
using namespace std;
char kc,bc;
int n,x1,x2,y1,y2,kx,ky,bx,by,gcd;
int read()
{
    int x=0,f=1; char ch=getchar();
    while(ch<‘0‘||ch>‘9‘){if(ch==‘-‘)f=-1;ch=getchar();}
    while(ch>=‘0‘&&ch<=‘9‘) x=x*10+ch-‘0‘,ch=getchar();
    return x*f;
}
int GCD(int a,int b)
{
    if(b==0) return a;
    return GCD(b,a%b);
}
int main()
{
    x1=read(),y1=read();
    x2=read(),y2=read();
    gcd=GCD(y2-y1,x2-x1);
    kx=(y2-y1)/gcd,ky=(x2-x1)/gcd;
    if(kx>0&&ky>0||kx<0&&ky<0) kc=‘+‘;
    else kc=‘-‘;
    gcd=GCD(ky*y1-kx*x1,ky);
    bx=(ky*y1-kx*x1)/gcd,by=ky/gcd;
    if(bx>0&&by>0||bx<0&&by<0) bc=‘+‘;
    else bc=‘-‘;
    kx=abs(kx),ky=abs(ky),bx=abs(bx),by=abs(by);
    if(ky==1)
    {
        if(kc==‘+‘)
        {
            if(bx==0) printf("y=%dx",kx);
            else 
             if(by==1) printf("y=%dx%c%d",kx,bc,bx);
             else printf("y=%dx%c%d/%d",kx,bc,bx,by);
        }
        else 
        {
            if(bx==0) printf("y=%c%dx",kc,kx);
            else 
             if(by==1) printf("y=%c%dx%c%d",kc,kx,bc,bx);
             else printf("y=%c%dx%c%d/%d",kc,kx,bc,bx,by);
        }
    }
    else
    {
        if(kc==‘+‘)
        {
            if(bx==0) printf("y=%d/%dx",kx,ky);
            else 
             if(by==1) printf("y=%d/%dx%c%d",kx,ky,bc,bx);
             else printf("y=%d/%dx%c%d/%d",kx,ky,bc,bx,by);
        }
        else 
        {
            if(bx==0) printf("y=%c%d/%dx",kc,kx,ky);
            else 
             if(by==1) printf("y=%c%d/%d*x%c%d",kc,kx,ky,bc,bx);
             else printf("y=%c%d/%d*x%c%d/%d",kc,kx,ky,bc,bx,by);
        }
    }
    return 0;
}