simplify. ( 2/5 + 2/3 - 4/15 ) * ( 4/21 - 2/7 + 2/3)
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Step-by-step explanation:
(2/5+2/3-4/15)×(4/21-2/7+2/3)
(6+10-4/15)×(4-6+14/21)
(12/15)×(12/21)
144/315
19/35
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