Multiplication and division of integers, (12x2y-8xy2) divided by (- 4xy) （2x-y）（2x+y）+2x(x-2y) (2a-b)2-4（a-b）（a+2b） First simplify, then evaluate {(XY + 2) (XY-2) - 2x2y2 + 4} divided by (XY), where x = 10, y = 1=- You can add points

Multiplication and division of integers, (12x2y-8xy2) divided by (- 4xy) （2x-y）（2x+y）+2x(x-2y) (2a-b)2-4（a-b）（a+2b） First simplify, then evaluate {(XY + 2) (XY-2) - 2x2y2 + 4} divided by (XY), where x = 10, y = 1=- You can add points

1. Original formula = 12x ^ 2Y / (- 4xy) - 8xy ^ 2 / (- 4xy) = - 3x + 2Y2. Original formula = 4x ^ 2-y ^ 2 + 2x ^ 2-4xy = 6x ^ 2-4xy-y ^ 23. Original formula = 4A ^ 2-4ab + B ^ 2 - (4a + 4b) (a + 2b) = 4A ^ 2-4ab + B ^ 2-4a ^ 2-12ab-8b ^ 2 = - 16ab-7b ^ 24. Original formula = x ^ 2Y ^ 2-4-2x ^ 2Y ^ 2 + 4 = - x ^ 2Y ^ 2 = - (XY) ^ 2, x = 10, y = -