Question 166171
{{{(x^3*y-3*x*y)-(x*y)^3=(x^3*y-3*x*y)-(x^3*y^3)}}}
{{{(x^3*y-3*x*y)-(x*y)^3=x^3(y-y^3)-3*x*y}}}
{{{(x^3*y-3*x*y)-(x*y)^3=x^3y(1-y^2)-y(3*x)}}}
{{{(x^3*y-3*x*y)-(x*y)^3=y(x^3(1-y^2)-(3*x))}}}