a) (2/3*7+2 1/4-1 5/6):3 2/9=
=(14/3+9/4-11/6):29/9=
=(56/12+27/12-22/12):29/9=
=61/12*9/29=
=183/116=
=1 67/116
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a) (2/3*7+2 1/4-1 5/6):3 2/9=
=(14/3+9/4-11/6):29/9=
=(56/12+27/12-22/12):29/9=
=61/12*9/29=
=183/116=
=1 67/116