5•(9/14+5/7)-1:3/4•75/56
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5*(9/14+5/7)-1:3/4*75/56=5 125/266 9/14+5/7=9/14+10/14=19/14 5*19/14=95/14 1:3/4=1*4/3=4/3 4/3*75/76=25/19 95/14-25/19=1805/266-350/266=1455/266=5 125/266