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13,5 - (-3,6) * (-1,7) = 13,5 - 6,12 = 7, 38
(1.3/4 + 1.2/3 ) : ( -4 - [-1.2/3]) = (1.9/12 + 1.8/12) : 2.1/3 = 3.5/12 : 2.1/3 = 41/12 : 7/3= 41/12 * 3/7 = 1.3/28
(-4,8) : (-2) + (-1/2) * 4/5 = 2,4 + 2/5 = 2,8
tam gdzie są kropki powinny być po prostu przerwy .