9m5+12m4−6m23m2=9m53m2+12m23m2−6m23m2=3m3+4m2−2 (ii) We have,
24x3y+20x2y2−4xy2xy=24x3y2xy+20x2y22xy−4xy2xy=12x2+10xy−2
Divide 4xy5xyz by 4z3xy