[2,8×3,5-2,(6)]:7,1(3)=
=[28/10×35/10-(26-2)/9]:(713-71)/90=
=(7/5×7/2-24/9):642/90=
=(49/10-24/9):107/15=
=(49/10-8/3):107/15=
=(147/30-80/30):107/15=
=67/30:107/15=
=67/30×15/107=67/314
