(-5/12-1/24-5/6)*(24*5/9-24*2/9+24*2/3)

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(-5/12-1/24-5/6)*(24*5/9-24*2/9+24*2/3)

=(-10/24-1/24-20/24)*(24*(5/9-2/9+2/3))=-31/24*24=-31