Resolver las siguientes multiplicaciones y diviciones. (Simplificar)
1. -5/6 . 3/10 . 4/7=
2. -2/3 . (-1/5) . 15/14=
3. 4/7 . (-35/26) . (-3/10)=
4. 2/3 : 4/9=
5. 4/15 : (-8/5)=
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