Help me look at some math problems! It's a process (2xy-y) - (- y + YX) =? 5 (a squared b-3ab squared) - 2 (a squared b-7ab squared) =? First simplify, then evaluate (4a + 3a square-3 + 3A cube) - (- A + 4A cube), where a = - 2: 1 2X squared y-2xy squared - [(- 3x squared y squared + 3x squared y) + (3x squared y squared - 3xy squared)] Where x = - 1, y = 2

Help me look at some math problems! It's a process (2xy-y) - (- y + YX) =? 5 (a squared b-3ab squared) - 2 (a squared b-7ab squared) =? First simplify, then evaluate (4a + 3a square-3 + 3A cube) - (- A + 4A cube), where a = - 2: 1 2X squared y-2xy squared - [(- 3x squared y squared + 3x squared y) + (3x squared y squared - 3xy squared)] Where x = - 1, y = 2

(2xy-y)-(-y+yx)
=2xy-y+y-yx
=xy
5 (a square b-3ab Square) - 2 (a square b-7ab Square)
=5a^2b-15ab^2-2a^2b+14ab^2
=3a^2b-ab^2
(4a + 3a square-3 + 3A cube) - (- A + 4A cube)
=4a+3a^2-3+3a^3+a-4a^3
=-a^3+3a^2+5a-3
A = - 2, so the original formula = (- 2) ^ 3 + 3 * (- 2) ^ 2 + 5 * (- 2) - 3
=-8+12-10-3
=-9
2X squared y-2xy squared - [(- 3x squared y squared + 3x squared y) + (3x squared y squared - 3xy squared)]
=2x^2y-2xy^2-(-3x^2y^2+3x^y+3x^2y^2-3xy^2)
=2x^2y-2xy^2-(3x^2y-3xy^2)
=2x^2y-2xy^2-3x^2y+3xy^2
=-x^2y+xy^2
=xy(y-x)
X = - 1, y = 2, so the original formula = (- 1) * 2 * [2 - (- 1)]
=-6