Test Preparation on Mathematics-Binomial Theorem

If coefficients of x⁷ and x⁸ are equal in expansion of (2+x/3)ⁿ =then n = _______

The constant term in expansion of (3x2/2 -1/3x) x≠0 

Coefficients of middle terms in expansion of (2-x³/3)⁷ are... 

Middle term in expansion of (2/x - 3xy) ¹² is

If middle term is Kxm in expansion of (x+1/x) then m =_____