Posted by Crystal on Friday, March 8, 2013 at 11:20pm.
Subtract(5a^3+3 b^3)(2a^2b4ab^2+3b^3+5a^3)=

Math  Steve, Friday, March 8, 2013 at 11:49pm
since there's a 5a^3 + 3b^3 top and bottom, they just disappear, and you are left with
(2a^2b4ab^2)