Verified answer

A5,4+A3,2/A4,2-A2,1

na bruta

A5,4=5!/(5-4)!=5.4.3.2.1=120

A3,2=3!=3.2.1=6

A4,2=4!/2!=4.3=12

A2,1=2!=2.1=2

(120+6) / (12-2)

126 / 10= 12,6

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