计算：(2)0+(12)-1+16-22-数学

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• 8+12+1-(3-1)0．-数学
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• 计算题：①(-1)2007-|-2|+(π-2007)0-6×tan30°；②解方程：22x-1+51-2x=1．-数学
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• 计算：(π-3)0-(12)-2+(-1)3-sin245°．-数学
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