(-4 2/7+3 3/14)*(-14)=(-4 4/14+3 3/14)*-14=(-1 1/14)*-14=-15/14*(-14)=15
(-4 2/7+3 3/14)*(-14)=
=(-4 4/14+3 3/14)*(-14)=
=-1 1/14 * (-14)=
=-15/14*(-14)=
=15
(-4 2/7+3 3/14)*(-14)=(-4 4/14+3 3/14)*-14=(-1 1/14)*-14=-15/14*(-14)=15
(-4 2/7+3 3/14)*(-14)=
=(-4 4/14+3 3/14)*(-14)=
=-1 1/14 * (-14)=
=-15/14*(-14)=
=15