[(dwie trzecie) do potegi 2 + dwie trzecie - (1 i jedna trzecia)do potęgi 2]:[2 i jedna siódma : 1 i jedna druga]=
Pilnee to na jutro ;d
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2/3 do 2 +2/3-(16/9) do 2 : (15/7 : 3/2)=4/9+2/3-16/9 : (15/7 *2/3)=4/9+6/9-16/9:10/7=10/9 -16/9*7/10=10/9-56/45=50/45-56/45=-6/45=-2/15