问题描述:
计算:(1)3a/4b乘16b/9a²,(2)12xy/5a÷8x²y,(3)(-3xy)÷2y²/3x,(4)x+y/x-y乘y-x/x+y,(5)3a-3b/10ab乘25a²b³/a²-b²,(6)4y²-x²/x²+2xy+y²÷x-2y/2x²+2xy
问题解答:
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