Answer
$$x+y$$
Work Step by Step
Simplifying the expression using the rules of Algebra, we find:
$$\frac{x^2-\frac{3}{4}-\left(y^2-\frac{3}{4}\right)}{x-y} \\ \frac{x^2-y^2}{x-y} \\ \frac{\left(x+y\right)\left(x-y\right)}{x-y} \\ x+y$$
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