import java.io.*;
import java.util.*;
public class Polynoom2{
  public static void main(String[] arg) throws IOException{
      BufferedReader lugeja=new BufferedReader(new FileReader("poly2.txt"));
      String rida=lugeja.readLine();
      int[] p1=tykeldaPolynoom(rida);
      System.out.println(Arrays.toString(p1));
      rida=lugeja.readLine();
      int[] p2=tykeldaPolynoom(rida);
      System.out.println(Arrays.toString(p2));
      int[] p3=liidaPolynoomid(p1, p2);
      trykiPolynoom(p3);
  }
  static int[] liidaPolynoomid(int[] p1, int[] p2){
     int[] vastusp=new int[10];
     for(int aste=0; aste<vastusp.length; aste++){
       vastusp[aste]=p1[aste]+p2[aste];
     }
     return vastusp;
  }
  
  static void trykiPolynoom(int[] p){
    for(int aste=p.length-1; aste>1; aste--){
     if(p[aste]!=0){
      if(p[aste]>0){System.out.print("+");}
      System.out.print(p[aste]+"x^"+aste);     
     }
    }
    if(p[1]!=0){
      if(p[1]>0){System.out.print("+");}
      System.out.print(p[1]+"x");
    }
    if(p[0]!=0){
      if(p[0]>0){System.out.print("+");}
      System.out.print(p[0]);
    }
  }

  public static boolean kasMark(String tykk){
    return tykk.equals("+") || tykk.equals("-");
  }
  public static int[] tykeldaPolynoom(String rida){
    int[] kordajad=new int[10];
    if(!rida.startsWith("-")){
      rida="+"+rida;
    }
    StringTokenizer stk=new StringTokenizer(rida, "x+-^", true);
    String mark=stk.nextToken();
    while(stk.hasMoreTokens()){
      int kordaja=1;
      int aste=0;
      String tykk=stk.nextToken();
      if(tykk.equals("x")){
         kordaja=1;
      } else {
         kordaja=Integer.parseInt(tykk);         
         if(stk.hasMoreTokens()){
           tykk=stk.nextToken(); //x voi mark
         }
      }
      if(mark.equals("-")){
        kordaja=-kordaja;
      }
      
      if(!kasMark(tykk) && stk.hasMoreTokens()){
        tykk=stk.nextToken();
        aste=1;
        if(kasMark(tykk)){
          mark=tykk;
        } else {
          aste=Integer.parseInt(stk.nextToken());
          if(stk.hasMoreTokens()){
            mark=stk.nextToken();
          }
        }
      }
      System.out.println("kordaja "+kordaja + " aste "+aste);
      kordajad[aste]=kordaja;        
    }
    return kordajad;    
  }
}