5 10/19:(9/19−1)−4⋅3 1/2= 105/19 : (- 10/19)-2*3= - 105/19 * 19/10-6= -21* 1/2-6=- 21/2-6= - 33/2
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5 10/19:(9/19−1)−4⋅3 1/2= 105/19 : (- 10/19)-2*3= - 105/19 * 19/10-6= -21* 1/2-6=- 21/2-6= - 33/2