2/5*-3/5-1/14-3/7*3/5
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Answer:
(2/5 x -3/7) - 1/14 - (3/7 x 3/5)
= (-6/35) - (1/14) - (9/35)
= (-15/35) - (1/14)
= (-3/7) - (1/14)
= (-6/14) - (1/14)
= -7/14
= -1/2
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