计算;-12009×(-3)+1-22×3+(1-22)÷3+(1-2×3)2
计算:.
(8分)先化简,再求值:,其中.
计算:
(10分)(1)计算:22+(-1)4+(-2)0-|-3|; (2)先化简,再求值:(4ab3-8a2b2)÷4ab+(2a+b)(2a-b),其中a=2,b=1.