Expand the expression: $(x + \large\frac{1}{x}$$)^6$

Question

$\begin{array}{1 1}x^6 + 6x^4 + 15x^2 + 20 + 15\large\frac{1}{x^2} + 6\large\frac{1}{x^4} + \large\frac{1}{x^6} \\ x^6 + 6x^4 + 15x^2 + 15\large\frac{1}{x^2} + 6\large\frac{1}{x^4} + \large\frac{1}{x^6} \\ x^6 + 5x^4 + 20x^2 + 25 + 5\large\frac{1}{x^2} + 20\large\frac{1}{x^4} + \large\frac{1}{x^6} \\ x^6 + 15x^4 + 6x^2 + 20 + 6\large\frac{1}{x^2} + 15\large\frac{1}{x^4} + \large\frac{1}{x^6}\end{array} $