# What is the standard form of  y= x^3(x+2) -x^4 ?

$2 {x}^{3}$
$y = {x}^{3} \left(x + 2\right) - {x}^{4} = {x}^{4} + 2 {x}^{3} - {x}^{4} = 2 {x}^{3}$