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-1 1/2*3 2/3=-3/2*11/3=-33/6=-5,5
-7 1/3*(-1 2/9)=-22/3*(-11/9)=242/27=8 26/27
4/5+1 1/5:2 2/5+3/8*(-1 3/5)=4/5+6/5:12/5+3/8*(-8/5)=4/5+1/2+(-24/40)=8/10+5/10_24/40=13/10-24/40=52/40-24/40=28/40=7/10