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(1)计算: | 5 - 3 | + 2 5 cos 60 ° - 1 2 × 8 - ( - 2 2 ) 0 .
(2)先化简,再求值: ( x + 2 + 3 x - 2 ) ÷ 1 + 2 x + x 2 x - 2 ,其中 x = 2 - 1 .
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