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2012-11-14T17:37:51+01:00

A=3x(-8)-6x(6-9)=-24+18=-6

 

B=7/(4-3)/(7*6+2)/(7*5)/3=7/1/40/35/3=...

 

C=5/15/(2/3)/7=3/6/7=1/2/7=1/14

 

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