化简:(1)(x²/-y)的5次方·(y²/-x)³; (2)(-y/x)²÷（-y/x²）³.

化简:(1)(x²/-y)的5次方·(y²/-x)³; (2)(-y/x)²÷（-y/x²）³.
化简:(1)(x²/-y)的5次方·(y²/-x)³; (2)(-y/x)²÷（-y/x²）³.

化简:(1)(x²/-y)的5次方·(y²/-x)³; (2)(-y/x)²÷（-y/x²）³.
(1)(x²/-y)的5次方·(y²/-x)³
=-x的10次方/y的5次方*（-y的6次方/x的3次方）
=x的7次方y
(2)(-y/x)²÷（-y/x²）³
=y²/x²÷(-y³/x的6次方)
=-x的4次方/y