If (2x + 1/2x) = 5, then what is the value of (8x^3 + 1/(8x^3)) ?

If x + \(\frac{1}{x}\)  = n

then, $x^3 +\frac{1}{x^3}$ = n³ - 3 × n

If $(2x + \frac{1}{2x}) = 5$

then, $(8x^3 + \frac{1}{8x^3})$ = 5³ - 3 × 5 = 110