find the product:-
(2a-1/2a)(2a+1/2a)(4a2+1/4a2)(16a4+1/16a4)
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(2a-1/2a)(2a+1/2a)(4a^2+1/4a^2)(16a^4+1/16a^4)
={(2a)^2-(1/2a)^2}(4a^2+1/4a^2)(16a^4+1/16a^4)
=(4a^2-1/4a^2)(4a^2+1/4a^2)(16a^4+1/16a^4)
={(4a^2)^2-(1/4a^2)}(16a^4+1/16a^4)
=(16a^4-1/16a^4)(16a^4-+1/16a^4)
=(16a^4)^2-(1/16a^4)^2
=256a^4+1/256.a^4
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