计算:28x四次幂y²÷7x³y;(12a³-6a²+3a)÷3a
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![计算:28x四次幂y²÷7x³y;(12a³-6a²+3a)÷3a](/uploads/image/z/1963363-67-3.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A28x%E5%9B%9B%E6%AC%A1%E5%B9%82y%26%23178%3B%C3%B77x%26%23179%3By%EF%BC%9B%EF%BC%8812a%26%23179%3B-6a%26%23178%3B%2B3a%EF%BC%89%C3%B73a)
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计算:28x四次幂y²÷7x³y;(12a³-6a²+3a)÷3a
计算:28x四次幂y²÷7x³y;(12a³-6a²+3a)÷3a
计算:28x四次幂y²÷7x³y;(12a³-6a²+3a)÷3a
4xy
4a^2-2a+1