A cura di: Alfredo Bochicchio

$[2xy(-1/4x^2y)-(2x^2y)^3:(8x^3y)]:(1/4x^2+1/2x^2)$
$[-1/2x^3y^2-(8x^6y^3):(8x^3y)]:(3/4x^2)$
$[-3/2x^3y^2]:(3/4x^2)$
$-2xy^2$