simplify
1/5 + 3/4 -2/7
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0.66428571428 answer pls make me as brilliant
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1/5+3/4-2/7
1*4/5*4+3×5/4*5-2/7
4/20+15/20-2/7
19/20-2/7
19×7/20×7-2×20/7×20
133/140-40/140
93/140
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