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解答下列各题:
计算:.
(1)计算||=________.
(2)如果m的相反数是,则m=________,|m|=________.
(2007,成都,16)解答下列各题:
(1)计算:.
(2)解不等式组并写出该不等式组的整数解.
(3)解方程:.