pls help me with this question
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= 3/7 + (-6/11) + (-8/21) + 5/22
= 3/7 - 6/11 - 8/21 + 5/22
= 3/7 + 5/22 -(6/11 + 8/21)
= (66+35)/154 - {(126+88)/231}
= 101/154 - 214/231
= (303 - 428)/462
= (-125/462)
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