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= -8-((-27/10)*(-2/18)-3/10)= -8-(3/10-3/10)=-8-0=-8
B) (1,2*5/12-7/5/(-1,4))*2,2-1,2
= (12/10*5/12-7/5:(-14/10))*2,2-1,2=
(1/2-7/5*(10/14))*2,2-1,2=(1/2+1)*2,2-1,2= 1,50*2,2-1,2=3,30-1,20=2,10