public static void main(String args[]){
Scanner in=new Scanner(System.in);
String op=null;
while(in.hasNext()){
String line=in.nextLine();
StringTokenizer token=new StringTokenizer(line,"/+-",true);
int i=0;
String data[]=new String[token.countTokens()];
while(token.hasMoreTokens())
{
data[i]=token.nextToken();
i++;
}
Fraction a=new Fraction();
Fraction b=new Fraction();
Fraction c=new Fraction();
Fraction d=new Fraction();
a.set(data[0],data[2]);
b.set(data[4],data[6]);
if(data[3].equals("+"))
a.add(b).print();
else
a.subtract(b).print();
}
}
