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2014-02-10T17:38:48+02:00
((3/4+2/3:(3/4-1/2))* 6/41=  
=(3/4+2/3:1/4)*6/41=
=(3/4+2/3*4)*6/41
=(3/4+8/3)*6/41=
=41/12*6/41=
=1/2

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