Using properties find: 2/5 × -3/7 - 1/14 - 3/7 × 3/5
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2/5 × -3/7 - 1/14 - 3/7 × 3/5
=2/5 x -3/7 + (-3/7) x 3/5 -1/14
=-3/7(2/5+3/5)-1/14
=-3/7(1)-1/14
=-3/7+ (-1/14)
=(-6-1)/14
=-7/14
=-1/2
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