2a²b(-1/2a²b³+5ab²)-3a²b(-2/3ab)5ab²=?就是化简!
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2a²b(-1/2a²b³+5ab²)-3a²b(-2/3ab)5ab²=?就是化简!
2a²b(-1/2a²b³+5ab²)-3a²b(-2/3ab)5ab²=?
就是化简!
2a²b(-1/2a²b³+5ab²)-3a²b(-2/3ab)5ab²=?就是化简!
ab不能粘在一起,会被认定为一个名为'ab'的变量