for(;$=readline(e='');print(e||0))for(;[,c,,p]=/(.*?)x(\^(.[\d.]*))?/g($)||[],+c?c:c+=1;e+=r[0]*!!e?'+'+r:r)r=p?/-?(?=1$)|.*/(p*5*c/5)+(p-2?'x^'+--p:'x'):c