19 1/2:(14/5+3/7)=19 1/2 : (9/5+3/7)=19 1/2 : ((9*7)/35+(3*5)/35)=
=191/2 : ((63+15)/35)=19 1/2 : 78/35=39/2 * 35/78=1/2 * 35/2=35/4=8 3/4
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19 1/2:(14/5+3/7)=19 1/2 : (9/5+3/7)=19 1/2 : ((9*7)/35+(3*5)/35)=
=191/2 : ((63+15)/35)=19 1/2 : 78/35=39/2 * 35/78=1/2 * 35/2=35/4=8 3/4