The term independent of $x$ in the expansion of $\left(\frac{1}{60}-\frac{x^{8}}{81}\right) \cdot\left(2 x^{2}-\frac{3}{x^{2}}\right)^{6}$ is equal to :
(1) $-72$
(2) 36
(3) $-36$
(4) $-108$
Correct Option: , 4
Given expression is,
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