[(82+28)^2 - (82-28)^2]/82*28
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Answer:
(82+28)^2-(82-28)^2/82*28
=(82+28+82-28)(82+28-82+28)/82*28
=82^2*28^2/82*28
=(82*28)^2/82*28
=82*28
=2296
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