(52-4)(52+4)-1(3/5-1/2)

Let's simplify the expression step by step:

1. (52-4)(52+4) = (48)(56) = 2688
2. 1(3/5 - 1/2) = 1(6/10 - 5/10) = 1(1/10) = 1/10

Now, we have: 2688 - 1/10

To subtract the fraction from the whole number, we need to find a common denominator. In this case, the common denominator is 10. So the expression becomes:

26880/10 - 1/10 = 26879/10

Therefore, the final result is 2687.9.