# How do you write the polynomial (15-7xy^2)-(y^3-y^2x-15) in standard form?

color(green)(-y^3 - 6y^2x is the standard form.
$\left(15 - 7 x {y}^{2}\right) - \left({y}^{3} - {y}^{2} x - 15\right)$
$\implies 15 - 7 x {y}^{2} - {y}^{3} + {y}^{2} x + 15$
color(green)(-y^3 - 6y^2x is the standard form.