-2/5+[3/7+-9/13]=[-2/5+3/7]+-9/13
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Answer:
LHS
=-2/5+[39-63/91]
=-2/5+(-24/91)
=-182-120/455
=-302/455
RHS
=-14+15/35 +(-9/13)
=1/35-9/13
=13-315/455
=-302/455
As LHS=RHS, so both are equal.
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