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主要内容

有理表达式的乘除法(高级)

问题

将以下有理式相乘并简化结果。
start fraction, 12, y, plus, 8, y, z, divided by, y, start superscript, 4, end superscript, plus, 9, y, cubed, z, plus, 20, y, squared, z, squared, end fraction, dot, start fraction, y, squared, minus, 16, z, squared, divided by, 6, z, plus, 9, end fraction, equals
不会做了?
不会做了?