Calculation: 1. (- 2x-7y) ^ 2. (- 4x-3y) (4x-3y) 3. (- 1 / 2A + 2b) (1 / 2a-2b) 4. (A / 3 + 3) ^ 2 + (A / 3-3) ^ 2 5. (- x-y-1) (x-y-1) Simple operation 1.103×97-104^2 2.2012^2-2013×2011

Calculation: 1. (- 2x-7y) ^ 2. (- 4x-3y) (4x-3y) 3. (- 1 / 2A + 2b) (1 / 2a-2b) 4. (A / 3 + 3) ^ 2 + (A / 3-3) ^ 2 5. (- x-y-1) (x-y-1) Simple operation 1.103×97-104^2 2.2012^2-2013×2011

1.(-2x-7y)^2 =4x²+28xy+49y²2.(-4x-3y)(4x-3y) =9y²-16x²3.(-1/2a+2b)(1/2a-2b) =-(1/2a-2b)²=-1/4a²+2ab-4b²4.(a/3+3)^2+(a/3-3)^2 =a²/9+2a+9+a²/9-2a+9=2a²...