The term independent of x in expansion of $\bigg( \large\frac{x+1}{x^{2/3}-x^{1/3}+1} -\frac{x-1}{x-x^{1/2}} \bigg)^{10}$ is :

Question

$\begin{array}{1 1} (1) 4 \\(2) 120 \\ (3) 210 \\ (4) 310 \end {array}$