计算:
(1) ( a + b ) 2 + a ( a - 2 b ) ;
(2) m - 1 + 2 m - 6 m 2 - 9 + 2 m + 2 m + 3 .
-3-6+9-11+2
化简
(-5)×(-8)-(-28)÷4-2-(-2)-2×(-1)+|-4|×0.5+2×(-1)