from 0.1 to 50% by {HEAD ~ weight} of {TAIL ~ a bleaching agent}; and 
of
from 0.1 to 50 % by { HEAD ~ weight } of { TAIL ~ a bleaching agent } ; and
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH