5/3:(2/3+1/6):(1-1/6-1/4)+2/11x22/7-1+1/3
(10/9x3/5-1/6-1/8):(3/4-2/3)X2/9+(2-1/7:4/21)
Spiegare i passaggi. [attach]96435[/attach]
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