An algebra problem by Viki Zeta

Algebra Level 2

(4++4)x2 times(x++x)x times2=?\frac{(\underbrace{4 + \cdots + 4)}_{x^2\text{ times}}}{\underbrace{(x + \cdots+ x)}_\text{x times}} - 2 = \, ?

Find the value of the above expression given that kk is a non-zero real number and xx is a natural number.

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