-3.375*12+4.375*12-36*(1/18-1/12+1/3)

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-3.375*12+4.375*12-36*(1/18-1/12+1/3)-3.375*12+4.375*12-36*(1/18-1/12+1/3)-3.375*12+4.375*12-36*(1/1

-3.375*12+4.375*12-36*(1/18-1/12+1/3)
-3.375*12+4.375*12-36*(1/18-1/12+1/3)

-3.375*12+4.375*12-36*(1/18-1/12+1/3)
-3.375*12+4.375*12-36*(1/18-1/12+1/3)
=12*(-3.375+4.375)-(1/18*36-1/12*36+1/3*36)
=12-(2-3+12)
=1.

=-3.375*12+3.375*12+12-2+3-12
=1