Answer
$$2x^3y^2 + x^2y - 6x^2 - 4$$
Work Step by Step
Subtracting a polynomial means adding the opposite of that polynomial. By doing so, we will get rid of the parentheses:
$$13x^3y^2 - 5x^2y - 9x^2 - 11x^3y^2 + 6x^2y + 3x^2 - 4$$
Group like terms:
$$(13x^3y^2 - 11x^3y^2) + (-5x^2y + 6x^2y) + (-9x^2 + 3x^2) - 4$$
Combine like terms:
$$2x^3y^2 + x^2y - 6x^2 - 4$$
