def dl(l): l[0],l[1]=l[0]*l[1],l[1]-1; return l
co,pow,l,b='0','0',[],''
print "Enter co-eff and power, then enter 'stop' to stop"
while (co!='stop' and pow!='stop'):
    l.append([float(co),float(pow)])
    c,p=raw_input(),raw_input('x ^ ')
l.pop(0)
for a in l[:]:
    dl(a) #Differentiate before processing and output
    if a[1]==0:
        b = b+str(a[0]).rstrip('.0')+'+'
    elif a[1]==1:
        b = b+str(a[0]).rstrip('.0')+'x+'
    else:
        b = b+str(a[0]).rstrip('.0')+'x^'+str(a[1]).rstrip('.0')+'+'
print b.replace(' ','').replace('+',' + ').rstrip(' + ')