Question

Find the middle terms in the expression of
$(3x - \frac{ {x}^{3} }{6} {)}^{7}$
Or
Find the fourth term from the end in the expansion of
${( \frac{3}{ {x} ^{2} } - \frac{ {x}^{3} }{6} })^{2}$
​

Answer 1

Answer:

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