Answer
$$-3x^2+7xy-5y^2+7x-11.$$
Work Step by Step
We simplify by adding the $x^2$-terms as follows
$$4x^2+x^2-8x^2=-3x^2,$$
adding the $xy$-terms,
$$-3xy+9xy+xy=7xy$$
adding the $y^2$-terms,
$$-4y^2+y^2-2y^2=-5y^2$$
adding the $x$ terms,
$$5x-x+3x=7x$$
adding the $y$ terms,
$$-6y+6y=0$$
adding the constant terms,
$$-4+3-10=-11$$
The result is
$$-3x^2+7xy-5y^2+7x-11.$$
