(a) Compute the sum:101^2 - 97^2 + 93^2 - 89^2 + ...+ 5^2 - 1^2. (b)
Compute the sum (a +(2n+1)d)^2- (a + (2n)d)^2 +(a + (2n-1)d)^2 - (a+(2n-2)d)^2 + ... + (a+d)^2 - a^2.
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