2[2A + 2(A+B)] = 2[4A + 2B] = 8A + 4B
2(2a+2(a+b))= 2(2a+2a+2b)=4a+4a+2b
=8a+2b
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2[2A + 2(A+B)] = 2[4A + 2B] = 8A + 4B
2(2a+2(a+b))= 2(2a+2a+2b)=4a+4a+2b
=8a+2b