(-3/2)*(+1又1/3)*(-1-1/4) (-3/2)*(+1又1/3)*(-1-1/4)

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(-3/2)*(+1又1/3)*(-1-1/4) (-3/2)*(+1又1/3)*(-1-1/4)

(-3/2)*(+1又1/3)*(-1-1/4) (-3/2)*(+1又1/3)*(-1-1/4)
(-3/2)*(+1又1/3)*(-1-1/4)
(-3/2)*(+1又1/3)*(-1-1/4)

(-3/2)*(+1又1/3)*(-1-1/4) (-3/2)*(+1又1/3)*(-1-1/4)

(-3/2)*(+1又1/3)*(-1-1/4)
=(-3/2)*(4/3)*(-5/4)
=5/2
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=(-3/2)*4/3*(-5/4)=-2*(-5/4)=5/2