Fill in the Blank

During a workforce readiness program for technical roles, you are practicing the simplification of nested production formulas. You are asked to simplify the complex rational expression 1a+1bab+ba\frac{\frac{1}{a}+\frac{1}{b}}{\frac{a}{b}+\frac{b}{a}} using the least common denominator (LCD) method. You multiply both the numerator and the denominator by the LCD, which is abab. After distributing and canceling common factors, the terms in the denominator are aa+bba \cdot a + b \cdot b. This combines to the final denominator expression ____. (Use the caret symbol ^ for exponents, e.g., x^2 + y^2)

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Updated 2026-06-02

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