(1)原式=1×4+1+| 3 -2× 3 2 |=4+1+| 3 - 3 |,=4+1+0,=5;(2)原式= 3(x+3)?18 (x+3)(x?3) = 3x+9?18 (x+3)(x?3) = 3x?9 (x+3)(x?3) = 3 x+3 .当x= 10 -3时,原式= 3 10 ?3+3 =3