计算：（-2）2+（-1）-2+（5-2π）0÷3-1=______．-数学

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• （-5）0=______．-数学
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• 计算题：（1）5x+3yx2-y2-2xx2-y2；（2）1x+1+2x2-1；（3）|-3|+（-1）2013×（π-3）-（-12）-3．-数学
• 计算：(π-1)0+(-12)-1+|5-27|-23．-数学
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• 若（x-4）0+x-2有意义，则x的取值范围是______．-数学
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• 计算：①20+55-2；②(1+5)(5-2)；③132-122-32627-1；④3-864-(-2)-2×(-4)2+3(-2)3×(3-10)0．-数学
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