<PRE><B>Question 644350</B>
{{{sqrt (75x^2y) - sqrt (80xy^2) - sqrt (48x^2y) + sqrt(80xy^2)}}}

{{{x*sqrt (3*25xy) - cross(sqrt (80xy^2)) - x*sqrt (3*16xy) +cross( sqrt (80xy^2))}}}


{{{x*sqrt (3*5^2xy) - x*sqrt (3*4^2xy)}}}

{{{5x*sqrt (3*xy) - 4x*sqrt (3xy)}}}

{{{(5x - 4x)sqrt (3xy)}}}

{{{x*sqrt (3xy)}}}</PRE>