using appropriate properties 2/5*(-3/7)-1/6*3/2+1/14*2/5
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2/5*(-3/7)+1/14*2/5-1/6*3/2
=2/5[-3/7+1/14]-1/6*3/2
=2/5[(-6+1)/14]-1/6*3/2
=2/5*(-5/14)-1/4
=-1/7-1/4
=(-4-7)/28
=-11/28
=2/5[-3/7+1/14]-1/6*3/2
=2/5[(-6+1)/14]-1/6*3/2
=2/5*(-5/14)-1/4
=-1/7-1/4
=(-4-7)/28
=-11/28
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