(12890+6/5+8/7+10/7)/(6/5+8/7+10/7)

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(12890+6/5+8/7+10/7)/(6/5+8/7+10/7)(12890+6/5+8/7+10/7)/(6/5+8/7+10/7)(12890+6/5+8/7+10/7)/(6/5+8/7+

(12890+6/5+8/7+10/7)/(6/5+8/7+10/7)
(12890+6/5+8/7+10/7)/(6/5+8/7+10/7)

(12890+6/5+8/7+10/7)/(6/5+8/7+10/7)
(12890+6/5+8/7+10/7)/(6/5+8/7+10/7) =12890/(6/5+8/7+10/7)+1
= 12890/6(1/5+3/7)+1=12890/6*(24/35)+1=12890*24/(6*35)+1
=10319/7