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(2/3)ˉ³ + (-8)ˉ¹ * 7 + (0,5)² (3/2)³-(1/8)*7+(1/2)²
(5/2)²-(4/3)+7/12 25/4-4/3+7/12 75/12-16/12+7/12
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7/8-7/8+1/4 20/8+1/4 10/4+1/4
66/12
-------= 66/12 *4/11=2
11/4
37,5% z 2=37,5/100 *2=0,75