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Expand and simplify each of the following expressions
(a) #(1/2 + x)^2#
(b) #(ax + d)^2#
(c) #(1/4 + 1/x)^2#
(d) #(x- 3)^2#
(e) #(4x - 3/4)^2#
(f) #(1- 1/x)^2 #