(-5/12)×4/15×(-3/2)×(-6)

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(-5/12)×4/15×(-3/2)×(-6)
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(-5/12)×4/15×(-3/2)×(-6)
(-5/12)×4/15×(-3/2)×(-6)

(-5/12)×4/15×(-3/2)×(-6)
(-5/12)×4/15×(-3/2)×(-6)
=[(-5/12)×(-6)]×[4/15×(-3/2)]
=5/2×(-2/5)
=-1