谁能帮我出20道去括号,合并同类项的数学题出20道去括号,合并同类项的数学题(至少两个括号)
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![谁能帮我出20道去括号,合并同类项的数学题出20道去括号,合并同类项的数学题(至少两个括号)](/uploads/image/z/96937-25-7.jpg?t=%E8%B0%81%E8%83%BD%E5%B8%AE%E6%88%91%E5%87%BA20%E9%81%93%E5%8E%BB%E6%8B%AC%E5%8F%B7%2C%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98%E5%87%BA20%E9%81%93%E5%8E%BB%E6%8B%AC%E5%8F%B7%2C%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98%EF%BC%88%E8%87%B3%E5%B0%91%E4%B8%A4%E4%B8%AA%E6%8B%AC%E5%8F%B7%EF%BC%89)
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