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1) 137,42 – 15 – 9,127 = 113,293; 2) 67,58 – (42,37 + 8,13) = 997,08; 3) (159,52 – 142,78) + 11,189 = 27,929; 4) 4297,52 – (113,43 + 1298,3) = 2885,79