6-12xy+6- 1/5x +1/5y - 8 =
6(-2xy+)- 1/5(x-y) - 8 =
6(-2xy+)- 1/5*10- 8 =
6(-2xy+)- 10 =
6 - 10 =
6 * 100 - 10 =
590
-12xy+6
- 1/5x +1/5y - 8 =-2xy+)- 1/5(x-y) - 8 =-2xy+)- 1/5*10- 8 =-2xy+)- 10 =
- 10 = 
